Connection with a Gmail address
You don’t have an email that is generated by Microsoft and were invited to a sharepoint space? And your email address is a @gmail address? Follow this procedure
Click on the link provided by the user
Enter the gmail address that was used to received the invitation and click on next (You are then redirected to Google)
On Google part, select the account
Enter the password of the Gmail account ( and the MFA if it was activated for this account)
When logged to Google, the system send you back to Microsoft
Press on “accept”
You are now logged with your gmail account until you sign out or clean your computer