exchange 2007 move mailbox to exchange 2013

hello,

I HAVE move 1000 mailbox last night and this morning the network is 100%used, when i look the root cause is many outlook 2010 client resync the ost file, how is this possible? i have just do move mailbox from the same forest.

does this mailbox have a corrupted item on exchange 2007 and when i move them exchange 2013 correct the problem so outlook resync ost???

thank you for your help
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Brian BEE Topic Advisor, Independant Technology ProfessionalCommented:
Yes, Outlook wouldcertainly resynch the OT.  Can you try just synching one mailbox and se e what that does?
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