Hi @sem-sol
You should be able to open a ticket in the Support portal even with that issue. The confirmation email is sent to the email address you enter. If you have that email address configured in another mail client or can access it on a web client, you can confirm your account.
Troubleshooting this issue should be done via a support ticket, as we need connection logs and details for both Lansweeper and MSGraph
~~~~~~~ (〃 ̄︶ ̄)人( ̄︶ ̄〃) ~~~~~~~
Sweep that LAN, sweep it!