Determine On-Premise and Cloud Mailbox Users

During an Exchange online management activity for one of our enterprise clients, I had to determine which mailboxes are on cloud and which ones still resides on-premise. After going through several PS commands, I had to come up with a customized basic script to get this done neatly. This script will run against Office 365 and check for the following.

Get licensed users, fetch Display Name, UPN and IsLicensed properties and format the output then export the result to an CSV file.

Connect to Exchange online PowerShell using Connect-ExchangeOnline and then run the following  after customizing the output path to suit your environment.

Get-MsolUser -MaxResults 50000 |
Where-Object isLicensed -eq $true |
Select-Object -Property DisplayName, UserPrincipalName, isLicensed,
                        @{label='MailboxLocation';expression={
                            switch ($_.MSExchRecipientTypeDetails) {
                                      1 {'Onprem'; break}
                                      2147483648 {'Office365'; break}
                                      default {'Unknown'}
                                  }
                        }} | Export-Csv c:\Official\Tools\mailusers.csv

You can run it directly from PowerShell which would result as below if everything went well.

clip_image001

Or use PowerShell ISE

clip_image002

Result would look something similar to this.

image

Get-MsolUser -MaxResults 50000 |
Where-Object isLicensed -eq $true |
Select-Object -Property DisplayName, UserPrincipalName, isLicensed,
                        @{label='MailboxLocation';expression={
                            switch ($_.MSExchRecipientTypeDetails) {
                                      1 {'Onprem'; break}
                                      2147483648 {'Office365'; break}
                                      default {'Unknown'}
                                  }
                        }} | Export-Csv c:\Official\Tools\mailusers.csv

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s