What is the right format to migrate from Kerio mail server without reset all users password?

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Occasional Visitor

HI to all,

I have to migrate about 300 user mailbox from Kerio mail server to Exchange Online.

I don't know users' password so I can't use the classic format for the CSV.

 

I've tried with Dovecot format without success.

I've tried with Mirapoint format but there is a problem. I used the below format:

 

EmailAddress,UserName,Password
usermailbox@contoso.com,#usermailbox@contoso.com#admin#,Password

 

but exchange online start to migrate admin mailbox instead the user mailbox. 

 

Any ideas?

I would like to avoid to change all users' password :)

 

thanks a lot

Bye

Emanuele C

 

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