Clients are unable to accept the Intuit Link invitation. When attempting, client receives a webpage blocking access stating: Microsoft Defender for Office 365 error

[Rherman21]

Message: The page that you are trying to access cannot be loaded. Due to an internal error, this webpage could not be loaded. We recommend that you close this page.

I believe its a MS security issue, but its new for our firm and how can I advise clients to work around?

[IntuitGabi · Accepted solution]

Try clearing cache and cookies, try accessing your account with this link or this one. 
If you or your clients are still having troubles logging in, send me a private message so I can do some research.