Is there any harm in patching most of our Exchange Servers with Rollup 7 (our two Edge Transport Servers, the two Hub Transport Servers and the Passive Mailbox Server) with Exchange Roll Up 7, and then patching the Active Mailbox Cluster server a few days later? The Active Mailbox Cluster server will require a brief outage, so we need to schedule that. Meanwhile, I was thinking of going ahead and patching the other servers one at a time, but I wasn't sure if any complications could arise from several servers being on Roll Up 7 with one server on Roll Up 5?
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