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HamidAkbari-0072 avatar image
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HamidAkbari-0072 asked joyceshen-MSFT commented

exchange SU Update

I miss ecp panel whenever I Install SU Update (Exchange 2013 or Exchange 2016),but whenever I Install CU Update I don't face any problem.

Is there any problem in Installing Su Update process?
Is it Necessary to install or I can wait for SU Update?

office-exchange-server-itpro
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AndyDavid avatar image
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AndyDavid answered HamidAkbari-0072 commented

You should install the latest SU immediately from an elevated admin prompt

If you are seeing any issues afterwards:

https://docs.microsoft.com/en-us/exchange/troubleshoot/client-connectivity/exchange-security-update-issues

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CU Update contains all the previous SU Updates? or they are not related to each other?

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joyceshen-MSFT avatar image
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joyceshen-MSFT answered joyceshen-MSFT commented

Hi @HamidAkbari-0072

Yes, it is Necessary to install the SU Update. The security updates for Exchange Server address vulnerabilities responsibly reported by security partners and found through Microsoft’s internal processes. Although we are not aware of any active exploits in the wild, our recommendation is to install these updates immediately to protect your environment.

Please check the Known issues in the security update

And we may also encounter the issue after installing the latest SU: Can't sign in to Outlook on the web or EAC if Exchange Server OAuth certificate is expired, which caused by oauth certificate not configurd correctly.

You could also check if any error recorded in application log.


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Hi @HamidAkbari-0072

Is there any update about your issue?

Each Cumulative Update (CU) is a full installation of Exchange that includes updates and changes from all previous CUs. However it doesn't contains SU. And you need to downlaod SU additionally which matches with your server and CU version.

Exchange Server build numbers and release dates


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