First issue is likely solvable by your IT department by looking through the AAD sign-in logs for your activity. The second is because authentication is per-dev

First issue is likely solvable by your IT department by looking through the AAD sign-in logs for your activity. The second is because authentication is per-device (and depending on the scenario, per-app). The token lifetime is configured by your IT department. Microsoft's default is 365 days, if I recall.