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I have a site-to-site VPN, writeable DC in main office, Read-only DC in branch office.

Today the VPN went down, but i couldn't log in to the read-only DC - the error message came up There are no logon servers to process your request.

Since the RODC is a domain controller, there is no local administrator.

How can i ensure that i am always able to log on to the RODC with a known account in an emergency if the writable DC is not available?

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up vote 2 down vote accepted

You need a GC - Global Catalog - to process logon requests ;)

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Modify the PRP to allow a certain account's password to be cached.

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