Intermittent issue where authentication tab shows invalid state

[DHaussermann]

There seems to be an intermittent issue where the tab used to authenticate to Azure shows invalid state.

This did not occur on each attempt. Interestingly. The user connected without issue and there seem to be no functional problems.

I saw no indication in the logs as to why the browser said invalid state and the authentication seemed to work fine.

Steps used:

• Login to Mattermost
• Type /msteams start
• Click the connection link (opens in a new tab)
• Provide credetials

Observed: Invalid State
Expected: Message that authentication succeeded and I should close the tab.

[DHaussermann]

@larkox do you have any suggestions as to a possible cause for this issue as it seems to be intermittent.

[larkox]

It is weird that it is intermitent, but I think where I have to look. Will try to fix.

[DHaussermann]

@larkox I can reproduce this issue today.

Strangely, it seems that the auth works as a meeting was created for the affected user. Logs showed no record for MS teams after the message that user had to connect an account.

Steps:

• Deployed build f00ca1ce
• Get team invite link
• Open new incognito session
• Create a new user and login
• Type /mstmeetings start
• Click on the connection link
• In new tab - login as test user (Sent DM)

Expected: Message that authentication worked and tab should be closed
Observed Invalid state message

[AayushChaudhary0001]

@wiggin77 I tried to reproduce the issue but was not able to do so.
Observed behaviour: When I clicked the connection link and entered the credentials, I did not see any invalid state message.