Cloud to On-premise

[Deleted]

@Vasil Michev and @Tony Redmond 

I have a unique situation to discuss. I am working on a plan to bring Mailboxes from Cloud back to On-premise. I need to set up greenfield infrastructure for Exchange and other collaboration tools. I have a couple of concerns and appreciate if you could help me on this.

Average Mailbox Size is 10gb

Almost 60% of users are above 10GB Mailbox and 98GB is the Highest one.

How do I migrate them back to On-premise? I know I cannot accommodate their current size back to On-premise. We are thinking of Mailbox size of 1GB back on-premise.

Let me know how to deal with such situations?

[#2]

Why are you not able to accommodate the size? On-premises you can have mailboxes as large as you want, provided you have the hardware. Unless you want to deal with "archiving" to an external system, or even worse, PSTs.

[#3]

You could apply stringent mailbox retention policies to remove and permanently delete all email older than (say) 3 months. That would reduce the size of the mailboxes to a manageable size. But I wouldn't do it without telling the users what you are going to do...

[#4]

Thanks @Tony Redmond and @Vasil Michev will bug you if i have additional questions