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sword12

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exchange online and on premise

Hi Experts 


we got a very big problem on our locla data center 

so we start ot rebuild the systems  and restore from backup 

but during this time becuse we have office 365 

so we activated all our users to access the emails from exchange online 


Note : before the problem the all mailboxes located in our data center 


now the user since weeks using exchange online 


so what the best way or tool to merge the old mailboxes which usaed to be on premise with the mail boxes on exchange online 


for example user sword now working since week on exchange online and 


whaen we recover the old exchange  what we can do 


option 1 


export every mailbox as pst file and try to use tool like codetwo 


or instal new exchange and importn the data bases then make coexsist configuration and migrate or merge i dont know the mail boxes 


do you know the best way or tool to do such crazy thing 


thnaks 

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sword12

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WOW

a great answer

do you think codetwo tool can help to import pst file to a mailboxes or do you know another tool 
All 3rd party tools will take time to import PSTs, Depends on the size though.
I recommend to upload the PSTs to Azure Storage and import.
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ASKER

azure storage like blob ?
and it will be kind if you doc how to import or merge pst with Mail box on exchange online
thanks