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Questions tagged [exchange-2016]

Microsoft Exchange Server 2016 is the latest release of Microsoft's email and calendaring server software.

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Exchange 2016 - new Databases and Migration

We are running Exchange 2016, 14 Databases currently running on drive letters. We want to move to mount points, and as part of this, create new DBs and migrate all mailboxes (as this will also clear ...
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Exchange Server Autodiscover external URL

All. I am nearing the completion of the setup of our Exchange Server. The process has been a challenge, but I have enjoyed learning new things. What I am working on now is setting up the autodiscover. ...
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Exchange 2016 database keeps dismounting

We have an exchange environment with a DAG setup. Since yesterday database copy keeps suspending. Copy works when we do it manually using the update option. The worst thing is some of the databases ...
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How do I migrate my Exchange 2016 from Windows Server 2012 R2 to Server 2016?

I have Exchange 2016 CU22 installed on a Windows Server 2012 R2 Hyper-V VM. I need to migrate that Exchange to a Windows Server 2016 VM. There are about 80 mailboxes totaling about 1.2TB. We have ...
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Sending Mail Fail with NDR '554 5.2.0 STOREDRV.Deliver.Exception:ObjectNotFoundException'

there is a problem in sending some mails to one user, some random mails sent normally to any recipient expect one user, which return a NDR as follow Remote Server returned '554 5.2.0 STOREDRV.Deliver....
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Exchange mailbox stopped syncing on mobile - work with a weird behavior

Workaround found - I'm encountering a weird issue on Exchange Server 2016 on premise. 2 users of my Active Directory base stopped receiving new email on mobile (Outlook Android client), but email are ...
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How does Microsoft Exchange determine which mailbox database a mailbox is in upon authenticating via POP3?

Performing a Microsoft Exchange 2010 to 2016 migration and everything is ready for transition besides this one problem. I have an internal CNAME DNS record mail.domain.tld that is pointing to the ...
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Exchange '16 Network Adaptor Guid Issue after Reinstall

I am having issues with Receiving Emails on my Exchange 2016 Cu 22 Update 2 on Server 2012R2 On-site server. When I run a microsoft inbound SMTP Connectivity Test, I get the error of "Cannot ...
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Postfix unable to authenticate with Microsoft Exchange (No credentials were supplied)

I want to setup postfix on my nagios server to relay emails to our Microsoft Exchange server and I am running into issues with authenticating with Microsoft Exchange. Specifically I am getting this ...
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Ex 2016 Cu22 upgrade is now causing ELCLastSuccessTimestamp and get-serverhealth compliance errors

When running get-serverhealth checks on our on prem 2016 Exchange servers, after upgrading to cu22, I am now seeing compliance failures. Upon further investigation using the powershell command Get-...
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How can I find out which computer on my network is logging into Exchange 2016 and at what time

Recently, multiple employees have come to me saying that their exchange accounts were breached over the time span of a few days. I have a theory that there is some form of worm on one of the computers ...
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How can I invalidate all user logins on Exchange across all browsers, devices and machines?

I believe multiple of the user accounts on this exchange server to be compromised. I have already reset the user passwords of the affected accounts, but I want to be certain that any session that was ...
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Inbound SMTP not working

I am in the process of deploying and configuring an on-premise exchange 2016 server. My inbound/receive connector is not working. When I telnet into my server on port 25 from a computer on an external ...
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1 answer
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Exchange Server 2010 to 2016 migration

A small company I am working for has a self-hosted Exchange Server 2010 running, and my job is to migrate this server to an Exchange server 2016, since the old one is out of support for quite a while ...
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Exchange. How to forward mail, not save it

We are migrating mail from one of our domains to the exchange (123123.com). We created users in AD, created mailboxes for them and copied mail from Google there. Also the domain was added to accepted. ...
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OWA 500 error, ECP works fine

I'm getting a 500 error after logging in to OWA. I enter the credentials on the sign in form, it redirects to the frowny face with error 500. More details just shows my server name and the UTC date/...
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Automate the creation of secondary mailbox in Outlook 2016

I allow myself to do this post in order to have your help. I am currently looking for a solution to automate the addition of a secondary mailbox in Outlook 2016. I saw a lot of stuff including the &...
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System Volume Information in too huge in Windows Server 2016

I am new in system administration. One of my Windows Server 2016 disk has issue on space which is system volume information consume huge spaces and keep growing uncontrollably. Current size is 1.6TB ...
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Error Hostname DOES NOT VERIFY - Test certificates TLS Exchange 2016 cu21

Practicing with the certificates, in let's encrypt win-acme normal is created, I send and receive normal mail, https in owa and the other services Testing with checktls, it gives me an alert message : ...
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Change Internet facing IP for Exchange server

I have to change Internet facing IP for Exchange server 2016 CU21. We use pfSense as a routing solution, on which New Gateway is set - New ISP, works withouth issues. Upstream Gateway set on x.x.x.161/...
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Switching from self-signed certificates to commerical TLS/SSL cert: will it work the way I expect?

New to the world of commercial certs, thanks in advance for any advice/guidance. Our only outbound service is email, hosted on MS Exchange 2016 (2019 in medium-term future). Internally we have several ...
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Exchange 2010 to 2016 (Multi Site)

My scenario: Datacenter #1 — AD Site “A” * -4 ISP internet connections. (Outbound independently) * -2 DCs GC (FSMO) Internal DNS * -2 DNS Servers - External DNS hosted into a DMZ (SPF / MX / PTR ...
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Hide Unlicensed Account in Microsoft Teams Search - OnPremise Exchange

We have about 500 AD user accounts and 300 email mailboxes - 200 of which have a Teams account. We are currently still using our on-premises Exchange 2016 server for all email accounts. When searching ...
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Duplicates are being imported into Exchange Mailboxes

I am using the New-MailboxImportRequest to import .PST files into existing mailboxes. These mailboxes have emails in them that are also included in the .PST file being imported. The import request ...
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How is the age for public folder calendar, task and contacts determined?

We are running Exchange 2016 on premise and the upper management wants to set an age limit for public folders. We have a lot of public folders with tasks, contacts and calendar items. How is the age ...
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In an Exch 2016/EXO hybrid deployment, should a telnet message test on prem be considered internal

I have inherited a hybrid deployment between Exchange 2016 on prem and Exchange online. One of the first things I had to do was turn of centralized message transport, as it was adding two unnecessary ...
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Exchange 2016 ECP failing - 503 Service Unavailable

My Exchange server is really suffering at the moment. I do not know what has happened but when I connect /ECP I get 503 errors. I can view the login page successfully, but after a successful login all ...
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Error: Exchange 2016 Unable to install CU19 Update

We have a hybrid Exchange environment that I'm trying to patch up. We're currently running CU16, and I've tried upgrading to both CU18 and CU19 with the same errors. During installation, it makes it ...
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exchange hybrid, management server do I still need HCW/Agent?

we currently migrated all our mailboxes into the cloud and want to keep one single exchange server (a pretty clean one) after our migration. do we still need the HCW Hybrid Agent or can we remove it ...
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Exchange 2016 - Huge ClientAccess OWA & Perm Folders

Running an Exchange 2016 server currently with CU19. I have noticed over the years of CU's been applied that the Exchange Server\V15\ClientAccess\OWA folder has grown in size (Currently 9Gb in size, ...
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Exchange 2016 won't recreate HealthMailboxes for Monitoring

I needed to repair some corrupt Monitoring HealthMailboxes. I've followed the instructions from numerous articles indicating I should stop the Microsoft Exchange Health Manager (and Recovery) ...
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Found errorEE.aspx Web Shell in Exchange 2016 auth folder

So recently Microsoft published this document: https://www.microsoft.com/security/blog/2021/03/02/hafnium-targeting-exchange-servers/ They mention a web shell called errorEE.aspx and when I checked my ...
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MS Exchange 2016 CU19 Update Error: The operation failed because UPN value provided for addition/modification is not unique forest-wide

I am trying to update exchange to the latest CU. We have a hybrid setup with O365 and since we barely use the server we have fallen behind on updates. The last time it was updated was before I was ...
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Outlook 2019 Calendar wont sync updates

I have an issue on some users with Outlook 2019, which Calendar won't sync updates on meeting. Outlook is connected to Microsoft Exchange 2016 On-prem. So, meeting was created by User A, and User B ...
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Only allowing Limited Set of Anonymous user to relay emails to external address in Exchange Server 2016

My requirement is slightly different from this question : Only allowing authenticated user on host to relay emails to external address in Exchange Server 2013 We are using Exchange-2016 and need to ...
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Issue with Autodiscover and external mail communication

I've got a problem with the initial configuration of an Exchange Server 2016. Sending/receiving internal emails works but not to/from the oudside. I tested the inbound SMTP mail flow with ...
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Why mails sent internally, disappear upon arrival? [closed]

I have a problem with internal mail flow. On one shared mailbox I have this issue, that when email is sent to it, some users don't get it. It's Microsoft Exchange Server 2016. I did use Test-Mailflow ...
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What is the cause of Windows Server Event ID: 15021? [closed]

I have 4 identical Exchange 2016 servers. A little over a month ago, I renewed my wildcard cert on all 4 servers and assigned it to services IIS and SMTP -- on all 4 servers. Today, I noticed that one ...
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Exchange & Outlook 2019 AutoDiscover Fails

We have an internally hosted Exchange server on the company domain, domain joined clients are able to autodiscover our exchange server with no issues. We have a laptop that will not be joined to the ...
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Exchange (2016) many mailbox delegations and throttling policies

At a customers site with 20+ employees per team I get an outlook warning message roughly translated to "The amount of elements opened at once has been limited by the server administrator". ...
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1 answer
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Exchange 2016 locks AD-User

our Exchange Server locks out one AD-User since the User changed the password. He can log in to Windows, starts Outlook and locks the User, every day. We Use the Exchange Server 2016 and the AD is on ...
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Do new versions of OWA have an equivalent to the About page of OWA in Exchange 2010

Using the Exchange 2010 version of Outlook Web App (OWA) you could click the (?) button and then click About to get a really useful page containing information about the Mailbox server, Proxy server, ...
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Delaying delivery of emails out of business hours for Exchange

I am having an interesting problem to solve. We want to be able to delay the delivery of certain business emails sent from some managers to their staff after business hours to the next working day. ...
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3 votes
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Migrate hybrid Office 365 to new tenant

We currently have a hybrid on-prem/Office 365 environment. Our Exchange is on-prem. Users are synced to an Office 365 tenant using Azure AD Connect so they can use Teams/Sharepoint etc. We want to ...
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Exchange server redirect email to another smtp

Does anyone know if it's possible to redirect email received to Exchange server 2016 to external SMTP MTA? For example everything received from domain.com to be redirected to encryption gateway. So ...
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Login Exchange Office 365 in Office 2016 and from PC Active Directory

i have some issue here. i have domain Active Directory xxx.id and domain Office 365 abcd.com in WORKGROUP PC i can login my email Office 365 using Office 2016. and if i login my email from Office 365 ...
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Anti-spam whitelisting by sender IP in Exchange 2016 on-prem

I can't seem to find the way to bypass the anti-spam filter by IP address in the Exchange 2016. The goal is to allow POS tills to send automated emails to accounts when the bill is closed. The ...
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Exchange 2016 Server Rejecting Certificate as Expired

We have emails sent using TLS from a Windows 2012R2 (non-domain joined) web server in our DMZ to our internal Exchange 2016 server (also running on Windows 2012R2). This was working fine up until ...
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Exchange 2010/2016 Co-Existence, Secondary Logon Prompt

We're currently running 2010 and 2016 in co-existence and we've migrated our first mailbox, woho! However, on the test user account, the mailbox will not connect to the server, running an auto-...
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MS Outlook keeps not responding when requesting data from Exchange

Looking for some pointers on this one…. MS Outlook keeps not responding when requesting data from Exchange The setup up… Three locations: one is the head office running Windows 2016 servers (AD ...
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