Hi Anthony

Thank you for posting in the Community! You can update the email address associated with your Lucidchart account through your User Settings page. For more information please view this Help Center article. 

I have my account with Office 365 login, that Office will be cancelled next month, how can I switch the account to google without loosing what I have?

Hey @ipinsight -- thanks for posting! To switch, the email address associated with your Lucid account must match the email associated with your Google account. As long as those match up, you should be able to use Google SSO with your account. 

As Liz said above, you can update the email address associated with your Lucidchart account through your User Settings page. For more information please view this Help Center article. 

Hope this helps!