Set up your account from the plugin

When you first start the MailMerge365 plugin you'll be greeted with a setup screen like this:

When you click "Connect with Microsoft 365" you will be prompted to login to Microsoft 365 with your account.

If it's the first time using MailMerge365 you will be asked to give the application permissions to your mailbox. 

When you complete the login your mailbox and Microsoft 365 account will be linked in MailMerge365 and you can proceed to send your first campaign.