Office.context.mailbox.getCallbackTokenAsync Error 9042

[CodeCube0]

I am getting this error every time I run "Office.context.mailbox.getCallbackTokenAsync", but I can't find any description for this error.

I would like to understand if it is a permissions problem, expired exchange server certificates or something else. I did not find any description for this error on the following page

https://learn.microsoft.com/en-us/office/dev/add-ins/reference/javascript-api-for-office-error-codes

[AlexJerabek]

Hi @CodeCube0,

Unfortunately, legacy Exchange tokens are deprecated and being phased out. Unless your add-in is intended for on-premise Exchange servers, you'll have to switch to Nested App Auth. More information can be found in the FAQ.

This is probably a large, disruptive change for you, so please let me know if you have questions.

I'll look into updating the page you linked to so this information can be found from there as well.

[davidchesnut]

I can add those errors to the error page.