4 Servers DAG plus witness server

I have 4 member DAG.  Two are in one network (network 1)  and the other 2 plus the witness server are in a another network (network 2).  Next weekend we are shutting down the 2 servers on network 1 because we are moving the office.  Would I have any issues because the other 2 servers in the network 2 plus the witness staying up.

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I QasmiTechnical LeadCommented:
If all the servers have the same mailbox databases
and you made the databases  on these 2 servers as active.
And the witness server is in the same network
then DAG will work , but will give errors for the other 2 servers.
If would be better if you suspend the database copies on the 2 servers shutting down
and then activate the copies when it is back online

Suspending and Resuming Database Copies


Suspend Multiple Database Copies

Moving the Active Database Copy to another DAG Member (aka Switchover)

When you have a planned outage and need to take a DAG member that holds one or more active database copies down for maintenance, it’s considered best practice to manually move any active database copies (aka performing a switchover) to another DAG member in the DAG. To move an active database copy to another DAG member using the EMC is accomplished by right-clicking on the respective database(s)

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