I plan to upgrade Call Manager from 4.1(3)SR4d to 4.1(3)SR5b. From what I read, it should be done sequentially starting from the publisher and then to the subscribers. Is there any issues if I do it in different days , say I upgrade one of the subscriber a week after I upgrade the publisher and half of the subscribers?
This is definitely not the recommended way to perform an upgrade. You could end up with problems with SQL replication, phone loads, etc. That being said, it may work, but there is some risk involved.
Hope this helps.
Brandon
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