Here are some steps that worked for me in converting a user mailbox to a shared mailbox.
Info: You can convert the following mailboxes from one type to another
- User mailbox to resource mailbox
- Shared mailbox to user mailbox
- Shared mailbox to resource mailbox
- Resource mailbox to user mailbox
- Resource mailbox to shared mailbox
Example reason why you might wan’t to do this:
You have a mailbox account with the name of bookclub and are looking make it a shared account because its consuming a license. To address this we will convert it to a shared mailbox account by issues the following commands in the Exchange Management Shell
[PS] C:\Windows\system32>Set-Mailbox "bookclub" -Type Shared
If you have multiple accounts, the following steps may apply to you
[PS] C:\Windows\system32>Import-CSV "C:\work\import.csv" | foreach {Set-Mailbox -Identity $_.user -Type Shared}
Please note the following csv document formatting:
User "jermsmit Internal" "jermsmit Sales" "jermsmit Local" "jermsmit PR" "jermsmit Recruiter"
Ref: http://technet.microsoft.com/en-us/library/jj710164%28v=exchg.150%29.aspx