This browser is no longer supported.
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(60.8, 81%, 15%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAC%3C/text%3E%3C/svg%3E)
What are my steps to update an 2016 Exchange Server CU5 to CU20? This is a simple mailbox, stand alone server no DAG. Its on Net Frameworks version 4.62. Any help before I begin is appreciated.
Follow these steps, rebooting after EACH step and running from an ELEVATED PROMPT.
Install .net 4.8:
https://learn.microsoft.com/en-us/exchange/plan-and-deploy/supportability-matrix?view=exchserver-2019#microsoft-net-framework
Run each step separately: ( not absolutely required in a single forest architecture. I always recommend it though. Otherwise run setup and these steps will be done automatically if you have the correct perms:
https://learn.microsoft.com/en-us/exchange/plan-and-deploy/prepare-ad-and-domains?view=exchserver-2016
Setup.exe /IAcceptExchangeServerLicenseTerms /PrepareSchema
Setup.exe /IAcceptExchangeServerLicenseTerms /PrepareAD
Setup.exe /IAcceptExchangeServerLicenseTerms /PrepareAllDomains
Then install CU20:
https://techcommunity.microsoft.com/t5/exchange-team-blog/released-march-2021-quarterly-exchange-updates/ba-p/2205283
then install the post CU20 security patch
Thanks Andy.
Being on CU5 and and with older Framework version is there anything else I should watch out for during this upgrade? Or Is this a relative straight forward upgrade with these steps?
Being on CU5 and and with older Framework version is there anything else I should watch out for during this upgrade? Or Is this a relative straight forward upgrade with these steps? just need to be sure.
Pretty straight forward.
Biggest thing: Ensure you install only using an elevated prompt for all instances. CUs, security patch and .net upgrade.
https://learn.microsoft.com/en-us/exchange/plan-and-deploy/install-cumulative-updates?view=exchserver-2019
If you run into any errors:
https://learn.microsoft.com/en-us/exchange/troubleshoot/client-connectivity/exchange-security-update-issues
Would i not need to follow the update path as detailed? Or i can go straight to CU20 .Net 4.8.? According to what i see in the examples I would need to perform steps below to have each version on a compatible .Net version along the way to the target update:
have an exchange 2016 CU5 (.net 4.6.2) that I want to take to CU20 (.Net 4.8). According to the tables on line, I would need to update to CU8 or CU9 then update .Net to 4.7.1 at this point i could update to CU11 or CU12. I would then update >net to 4.7.2 and CU14. At my final stage i would need to update .Net to 4.8 and CU20.
Thanks
Andy
No need to step through all those CUs. They are cumulative.
Go straight to .net 4.8 and Cu20 :)