How do I modify my Microsoft 365 mailbox?

This article will show you how to modify the mailbox included within your Microsoft 365 (formerly Office 365) account.

Please note: before starting this process, you will need to assign a domain name to your Microsoft 365 account first. For more information on how to do this, please read the following Support article: How do I add a domain to Microsoft 365?

Step 1 of 5

Start by logging in to your 123 Reg Control Panel.


Step 2 of 5

From there, select Microsoft 365 within the ‘Manage active products’ section. Next, click Manage opposite Manage Microsoft 365.

Manage Microsoft 365


Step 3 of 5

On the next page, select Log into Microsoft 365.

Log into Microsoft 365


Step 4 of 5

This will take you to your Microsoft 365 Control Panel. Simply select Modify for your desired user.

Select Modify


Step 5 of 5

On the pop-up window that appears, select the subscription type you wish to set for your address along with the Usage location. Once done, select Modify user to save your changes.

Modify user