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Questions tagged [exchange]

Questions about any version of Microsoft Exchange Server or Exchange Online, Microsoft's email and unified communications server product. Because of tight integration with other systems, related questions may overlap with Active Directory, Office 365, and Skype for Business (aka Lync Server or Office Communications Server). Questions about Microsoft Outlook may be a gray area, with Super User as an alternative site to ask on.

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Outlook w/ on prem exchange, multiple users sharing one mailbox best practices

At work, I manage a mailbox named "info" that approximately 35-40 users utilize, causing significant issues: Initially, when added as an additional user mailbox, it functions correctly. ...
Marc-Andre pouliot's user avatar
1 vote
1 answer
97 views

Removing final Exchange server, unable to follow Microsoft instructions

I'm reviewing the process to remove the last Exchange server in an environment by following Microsoft's instructions at https://learn.microsoft.com/en-us/exchange/manage-hybrid-exchange-recipients-...
Halfdone's user avatar
  • 175
3 votes
1 answer
141 views

Change in licensing stopped native mobile app from connecting to E365 Mailbox

I have a really strange one... we formerly had our tenant set up to grant E365 Plan 1 and Azure Plan 1 licenses to all mail enabled users, and have for a while. Employees granted mobile access were ...
Glenn Sullivan's user avatar
0 votes
0 answers
66 views

Microsoft Exchange 2019 Search not indexing new content

End of last year I upgraded Exchange Server 2016 to 2019. Everything was working after that. Following the upgrade, Exchange stopped indexing new content. Search is not returning new messages. One ...
Saper_ek's user avatar
0 votes
1 answer
64 views

Calling the Win32_Service class is VERY slow

I have some servers where I experience a very slow response when calling the Win32_Service through Get-WmiObject/Get-CimInstance. It takes anywhere between 20-45 minutes when calling the Win32_Service ...
praecox's user avatar
  • 79
0 votes
1 answer
81 views

Exchange Hybrid won't send to mailboxes created in EOL

We have an Exchange 2019 Hybrid server to remote mail-enable our AD users and send outbound to our mailboxes from certain legacy apps. Though our users are all AD-bound, we create some mailboxes (e.g. ...
tb1's user avatar
  • 187
0 votes
0 answers
58 views

Creating User Friendly Email Alias for Plus Email Address

We got a plus email address in our GitLab ticketing page. Example [email protected] This will be our ticketing system email address that any email send to this address will be ...
Tweety's user avatar
  • 1
0 votes
1 answer
176 views

Set-ExternalInOutlook - Keeps reverting to False

Hello- We have an odd issue: We are attempting to configure the in-line "External" tag using the supplied functionality in 365 via powershell: (Set-externalinoutlook) We've done this one ...
Doom's user avatar
  • 23
0 votes
0 answers
92 views

Allow On-Prem SMTP Connections to send email to in-Cloud (O365) Distribution List

I would like to move many of my on-Prem Distribution lists to ExchanceOnline Distribution Lists/Groups. (Not Microsoft 365 Groups/Teams style Group). Just a Simple Distribution list to be able to ...
scooter133's user avatar
0 votes
0 answers
66 views

Exchange 365 can't send as alias

We're running Office 365 for a company. In Exchange admin, I have all domains added, I did enable "Send email as aliases" in Mail Flow settings, and I have added alias to my email address in ...
masiton's user avatar
  • 11
1 vote
0 answers
34 views

How does Exchange Server store internally email categories?

Long story short: we had to migrate a shared customer support mailbox accessed by several people using Thunderbird/IMAP to a hosted Exchange Server 2019. Everything works fine... except the part where ...
PaulJ's user avatar
  • 171
0 votes
0 answers
37 views

Watchguard logs incoming SMTP connections has an dst_user entry. Where can I change this entry?

Hello fellow Exchangers, as mentioned in the title any incoming smtp connection is routed correctly to our onpremise microsoft exchange server and the logs look as described here: https://www....
erai's user avatar
  • 1
2 votes
1 answer
52 views

Out of Office was setup on an email which is now an alias; anyway to remove that out of office?

We have a user who a few months ago went through a process of condensing the multiple email addresses they had (All of which had their own associated mailboxes) into one email address. The past email ...
Tomsta's user avatar
  • 21
0 votes
1 answer
647 views

SPF spf.protection.outlook.com is invalid for messages within tenant

When sending mails through our Exchange 365 service those mails get through successfully, but if we look at the mail headers we see that where the sender and recipient are in our tenant the mail's ...
JohnLBevan's user avatar
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0 votes
0 answers
130 views

Where is Exchange Online Multipart message limit set?

A user reported that one of their suppliers started getting NDRs when sending a airline tickets via email. The NDR says: Remote Server returned: '550 Too many MIME parts: 178 > 100' When looking ...
dunxd's user avatar
  • 9,734
2 votes
1 answer
206 views

How to capture incoming emails on exchange before they reach transport agents?

I'm trying to debug why some inbound emails are failing DKIM checks. I'm running the latest version of Microsoft Exchange server 2019 on Widows Server 2022. I have enabled pipeline tracing via the ...
Danny.Ando's user avatar
0 votes
1 answer
106 views

Office365 - Exchange Mailflow Rules for Signature

im using Office365 / Exchange and I have setup a nice HTML template to attach dynamic E-Mail signatures using the Mailflow-Rule: "attach disclaimer". I have used the attribute %%PhoneNumber%%...
Steini's user avatar
  • 105
0 votes
1 answer
144 views

Queued mail stuck for a while on exchange 2010 in coexistence with exchange 2016

The emails are queued for approximately 2 hours and then it works for an hour, sending everything that is in queue. Repeat loop all the time.Each server is independent, there is no DAG. They are only ...
Luigi's user avatar
  • 35
0 votes
1 answer
141 views

Exchange Server 2013 to 2016 Migration error

I'm currently facing an issue during an Exchange Server database migration process from Exchange 2013 to Exchange 2016 and could really use some assistance. The migration process is failing with the ...
user1073813's user avatar
0 votes
1 answer
105 views

Weird email spam issue. Google Domain Exchange email server

We have a client who is blocking our email domain. Their IT wrote this to us. I've never seen this be an issue before. You are hosted on Google but have entries referring to Microsoft email protection ...
Phi's user avatar
  • 101
0 votes
0 answers
298 views

Mailbox cannot be found after migration to Exchange Online

First I should describe our situation a little bit. We have 2 different domains. Let's call them contoso.com and contoso2.com. Previously we only had contoso.com but there was internal conflict and ...
padawan_IT's user avatar
0 votes
1 answer
59 views

O365: Deleting messages via POP3 suddenly not working

A third-party app is using POP3 to download messages from a O365 mailbox. This has been working great for a few months. Some time on Saturday, DELE commands just stopped working. Looking through the ...
chroder's user avatar
  • 684
-1 votes
1 answer
249 views

Exchange online mail flows with python

We are running Office365 for our email platform. We are a small development firm. Most of the users are either Linux or Mac users, no Windows users. From what I was reading, there is a way to create ...
user2236794's user avatar
0 votes
1 answer
1k views

How to assign certificate to IMAP/S and SMTP/S in Exchange 2016?

Please advise me because I pull all my hair out. I have Exchange 2016 and I want to assign one officially signed-off certificate to the IMAP/S port 993/tcp and SMTP/S port 465/tcp . I went through ...
supi007's user avatar
  • 96
0 votes
2 answers
124 views

Check incoming email adresses on exchange server

We are using Exchange Server with Outlook, and a CMS system to manage our customer's Email addresses. The CMS can export the email address list and we could import it somewhere to outlook/exchange, if ...
Jan Katz's user avatar
0 votes
1 answer
187 views

DKIM signing - does it matter which transport agent does the signature

I am quite new to the dkim area. I understand how it works but some details, i am missing. Let's say, i have a mail server that contains user boxes (Exchange) and an edge server that just transports ...
atapaka's user avatar
  • 141
0 votes
3 answers
1k views

Exchange Server: Is it possible to find out which user marked an email as read?

We are running a self hosted Exchange 2016 Windows Server 2016 Datacenter. There is a shared mailbox used by multiple users. Users have been told to mark emails in this account only in special cases, ...
Thariama's user avatar
  • 106
0 votes
1 answer
462 views

Change Domain and DNS settings on Exchange 2016

I've seen a few questions on this topic, but I have some new ones and am looking for more detail or clarification on some of the answers because I'm super green regarding Exchange. I apologize if any ...
nnni's user avatar
  • 1
-1 votes
1 answer
132 views

Outlook shows an error message when idled for a long time

As mentioned in the title, "Attempt to log in to Microsoft Exchange failed" appears when using Outlook 2019 after being idled for a long time. error message For example: When user select &...
ChengYang Liang's user avatar
0 votes
2 answers
445 views

Forwarding email message breaks DKIM

I have problem with postfix, DKIM and forwarding messages. In almost every article about DKIM I’m reading that “if I do not modify any fields in message header, DKIM signature should still be valid ...
user71061's user avatar
  • 501
0 votes
0 answers
141 views

Exchange Migration Batch In-Progress

I am working on migrating users from exchange 2013 to exchange 2019 and ran into an issue when the disk was not large enough for the migration, causing the job to error out and one user to stop ...
bShaver's user avatar
  • 43
0 votes
1 answer
651 views

Allows User Login to Exchange OWA On-Prem Using Primary Email Address Instead of UPN

I am trying to find out if there is a way for users to login to our Exchange 2019 CAS server OWA using their primary email address instead of their UPN. For some reason when Exchange was first setup ...
Caynadian's user avatar
  • 496
-1 votes
1 answer
162 views

Error sending and receiving emails in Exchange 2010 and 2016 coexistence

These are the versions of the exchange servers: Exchange 2016 CU23 - 15.1 Build (2507.6) Exchange 2010 SP3 - 14.3.0513 Build(123.4) The problem is sending and receiving emails in Exchange 2016. ...
Luigi's user avatar
  • 35
0 votes
1 answer
369 views

Exchange admin center - message trace - delivered, delivered then failed

I was investigating something else when I've noticed this behavior: for a non-existing mailbox, Office365 "message trace" shows "delivered" two times then "failed" status....
rd1218's user avatar
  • 163
0 votes
0 answers
153 views

Using a Let's Encrypt certificate on a HA Exchange DAG setup

I want to set up Let's Encrypt certificates on an on-prem Exchange setup. We have 2 Exchange servers, to my understanding these are configured as a DAG. At the moment, these have a single self-signed ...
ieatpizza's user avatar
  • 113
0 votes
1 answer
323 views

Why is certificate request invalid from Exchange 2019?

I am creating a cert request in powershell on an exchange 2019 server as follows: $binrequest = New-ExchangeCertificate -Server "exchange" -BinaryEncoded -GenerateRequest -FriendlyName "...
TSG's user avatar
  • 1,852
0 votes
0 answers
2k views

Autodiscover error 600 from Exchange 2019

I am having trouble with my exchange 2019 server. I've narrowed it down to an autodiscover problem. First of all the (outlook 2013) client complains about an invalid cert on the exchange server, but ...
TSG's user avatar
  • 1,852
0 votes
1 answer
313 views

How to migrate a mailbox to exchange online from on premises without removing private internal domain addresses

I have two tenants (among others) that use a special private DNS to send email over non-internet routes. Every mailbox has an address on that domain assigned to it. so if we say company.com is the ...
Mark Winckle's user avatar
0 votes
2 answers
330 views

Exchange 2019 On-Prem Receive Connector Issue

I'm in the middle of migration right now from Exchange 2016 to Exchange 2019 on-prem. Everything works except for Receive connectors. Whenever I send an email to local exchange users from outside (i.e....
IamBayMax's user avatar
0 votes
1 answer
271 views

Outlook client fails to re-open with Exchange 2016 on prem

History We are migrating Exchange 2010 to 2019. We are at the middle point with Exchange 2016 and 2010 is still running. Environment Server Environment Active Directory Domain Level: 2012R2 Domain ...
Digital ink's user avatar
0 votes
0 answers
316 views

Enabling and Setting an Exchange Remote Mailbox using EWS or Graph via API call

I work for a higher Ed organisation and currently we onboard new students to Active Directory and Hybrid Exchange with Powershell scripts. I am bascially seeking to automate and move the process to a ...
Gus D's user avatar
  • 13
0 votes
1 answer
65 views

Exchange - OnPremises - Send-on-behalf for public folders behave as Send-As

We have a weird problem that has started occuring. Mail-enabled public folders configured as Send-on-behalf-of has started behaving as if they are configured with Send-AS for users. We have certain ...
Boof's user avatar
  • 1
1 vote
1 answer
663 views

Exchange online and zimbra on premise mail server sharing same domain

Am planning to Migrate my Zimbra mail server to Exchange Online but in the meantime, I need to configure some users (30 users) on Exchange Online and the rest on the Zimbra mail server version 8.8.15 (...
user avatar
3 votes
3 answers
682 views

Purview Message Encryption: Require OTP codes for all recipients, and bypass MS365 tenant logins for all outgoing emails

Related: MS365: Sending encrypted to remote tenants occasionally fails with "user not in tenant" As in the previous message, we are sending outgoing encrypted messages via MS365 and some ...
Thomas Ward's user avatar
0 votes
1 answer
91 views

can't get email from exchange to postfix

I configured a postfix mail server to receive emails. I enable TLS as per security requirements as well as port 25 is banned by the provider. I enabled both 465 and 587 with the following on master.cf ...
virgo's user avatar
  • 1
0 votes
0 answers
103 views

Block exchange from sending mails to internal organization

there is a very specific challenge I'd like solve and so far nothing worked. Situation: We have a rather large exchange environment with multiple domains (@domain-a.com, @@domain-b.com, @domain-c.com)....
slyonpc's user avatar
0 votes
1 answer
788 views

How to delete orphaned mailboxes

I have no clue how this could happen: Get-MailboxStatistics -Server returns 2 exactly equal entries Office [Foo Software] [It shows the used format]. One mailbox has 411 ItemCount, the other has 7. In ...
Peter VARGA's user avatar
0 votes
1 answer
810 views

Exchange On-Prem Retention Tag/Policy to Delete Online Archive Emails

We are running Exchange 2019 completely on-prem. Our default retention policy archives emails after two years to the user's Online Archive (it also cleans out some folders like deleted items, drafts, ...
Caynadian's user avatar
  • 496
0 votes
2 answers
2k views

Export to file Get-ACL for AD Computer Object then import later using Set-ACL

I could use some help. My Active Directory is 20 year old, its about to start buying legal alcohol and god knows where it's going from there... All joking aside, Exchange has ravaged my AD DACLs. To ...
Eric Weintraub's user avatar
0 votes
3 answers
1k views

autodiscover URL working/not working

I have this issue: In order to upgrade MS Office from 2013 to 2016 I had to set-up autodiscover so Outlook 2016 can connect to the Exchange 2010. Let's say this is my autodiscover URL: https://...
Peter VARGA's user avatar

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