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ITSK-2596 avatar image
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ITSK-2596 asked ·

EX16 CU11 to CU14 to CU19?

Gurus:

We are running EX16 standalone, single install currently on CU11 and .NET FW 4.7.1. I want to verify our update/upgrade paths with the ultimate goal of installing CU19 on .NET FW 4.8. Here’s how I see it should work for this:
1. Install .NET FW 4.7.2 >Reboot
2. Install CU14 (as Ent Admin member)>Reboot
3. Verify MS/EX services started, CU14 installed and test EX functionality
4. Install .NET FW 4.8 >Reboot
5. Install CU19 (as Ent Admin member) > Reboot
6. Verify MS/EX services, CU19 installed and test EX functionality
Thanks!
Cheers!
IT_SK

office-exchange-server-itpro
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AndyDavid avatar image
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AndyDavid answered ·

You can do that if you have CU14 avail,
but its not required.

Microsoft recommends applying .net 4.8, then upgrading to CU 19 immediately after that:

https://docs.microsoft.com/en-us/exchange/plan-and-deploy/supportability-matrix?view=exchserver-2019#microsoft-net-framework

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Thanks AndyDavid!

I was just worried about going directly from CU11 to CU19 directly which might leave room for as Microsoft states "upgrade failure". Anyone had success and or failures doing so?
I do have CU14 so I could do either really? Trying to avoid an upgrade failure but we do and will have backups of system and DB. If it is advised to install CU14 first, I could do that?

Thanks!

IT_SK

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Absolutely!
If you have CU14, then use your steps to be safe .
Microsoft put that disclaimer not because it means something will go wrong, but just to cover themselves :)

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Thanks Andy! Will do!

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