Exchange 2013 Default OAB Issue - Link address

Question

I have weird issue on my exchange default address book as follow:
Exchange server 2013 - 1 server

the default OAB stopped working for internal and external users, after investigation I found the internal and external links changing to blank or to something non understood as the attached picture.

when I change it manually to the correct address https://myserver/OAB everything works well for a day or less then suddenly change itself and stop working for clients.

what I did:

1. created new OAB.
2. Moved OAB to another Database

none of the above worked.

kindly someone explain what's going on to me or help me with steps.

Best

Answer 1

Hi @IBRAHIM SALEM ,

Based on your description, the OAB URI changed automatically to blank or something( sorry your picture was not loaded correctly).

I think you could remove the OAB virtual directory and re-create one. Re-creating OAB or doing something with the OAB itself is not related with this issue.

Remove-OabVirtualDirectory -Identity "Server1\OAB (Default Web Site)"  
New-OABVirtualDirectory -Server Server1 -InternalUrl Https://server1.domain.com/oab -PollInterval 480  

For more details, please refer to: https://learn.microsoft.com/en-us/powershell/module/exchange/new-oabvirtualdirectory?view=exchange-ps

If this doesn't work and the URI changes the next day, please check if your security softwares(windows defender or others) has virus detected.
And also if your Exchange is not the newest one, please consider a upgrade: https://techcommunity.microsoft.com/t5/exchange-team-blog/released-july-2021-exchange-server-security-updates/ba-p/2523421

Best regards,
Lou

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