Can i Install Exchange 2013 CU8 directly on CU3?

Hello Experts,

I have two Exchange 2013 server installed on Windows 2012 servers.
Servers are in DAG.
Currently we have Exchange 2013 CU3 installed on both the servers.
So i was wondering if i can install CU8 directly on my current setup that is CU3?


Thanks in Advance..
UDSquareAsked:
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Manikandan NarayanswamySecurity Specialist & IBM Security GuardiumCommented:
Hi,

If you have exchange 2013 installed you can directly go to CU8 without installing previous CU. Hence even if you have exchange 2013 CU3 installed you can directly go to CU8

https://technet.microsoft.com/en-us/library/jj907309(v=exchg.150).aspx

Thanks
Manikandan
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Will SzymkowskiSenior Solution ArchitectCommented:
CU8 specifically has a Schema update that is required. So when you install CU8 you will need to make sure that the account you are using is part of the following groups...
- schema admins
- enterprise admins
- domain admins
- Organization Management

Will.
0
UDSquareAuthor Commented:
Thanks,

Ok i have two servers in DAG so does that matters anyway??
do i have to follow any particulate procedure or i can update both the servers one by one?
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Manikandan NarayanswamySecurity Specialist & IBM Security GuardiumCommented:
Hi,

Well I would recommend to install CU8 update on servers one by one. Instead of installing updates on all of them at once. May be you can think of moving the active DB to passive ones while installing CU8 on the active ones.

Thanks
Manikandan
0
UDSquareAuthor Commented:
Thanks Manikandan,

So in that Case, first i will install CU on Passive node,
do you believe there will be any issues failing over to a more recent patched server?
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Manikandan NarayanswamySecurity Specialist & IBM Security GuardiumCommented:
Hi,

Nope mostly you should not face any issue while failing over to recently patched server.


Thanks
Manikandan
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Will SzymkowskiSenior Solution ArchitectCommented:
No there should be no issue. CU's are backward compatible and they are designed to work with older ones. However, they should not be on different versions for vary long.

Will.
0

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UDSquareAuthor Commented:
Thanks for your help Will and Manikandan,

Just one more question, is there any criteria when we have to install/Upgrade CU?
or is is like if we have exchange server, its recommended to install latest CU on it to work exchange smoothly?
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Manikandan NarayanswamySecurity Specialist & IBM Security GuardiumCommented:
Hi,

To run exchange server smoothly always you should be on the latest CU it contains fixes for most of the bugs


Thanks
Manikandan
0
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