I have extremely slow problems during this migration, I applied the policies required to the source:
Set-ThrottlingPolicy UCCSPolicy -EWSPercentTimeInAD $null -EWSPercentTimeInCAS $null -EWSPercentTimeInMailboxRPC $null
Set-Mailbox <ServiceAccountName> -ThrottlingPolicy UCCSPolicy
But the problem persist.
EWS throttling in Office 365, disabled.
the time is 2.5 days for an 8G mailbox,
during previous migrations it was 4 hours maximum
there are no bandwidth problems, there are no network problems, there seems to be a "block" in exchange 2010
can someone give me some advice?