Summary:
Users would not be able to perform integration using the Microsoft Project Integration Manager in a network that has Proxy enabled. They will repeatedly get to see Incorrect Web Timesheet URL Specified. When the error log for MSPI is checked, it will show 407, Authentication failed for user.

Cause:
This is due to the proxy authentication failing while the integration manger is initialized. The integration manager does not prompt for User Authentication as requested by the proxy.

Resolution:
The network administrator has to create an exception rule in the proxy settings to ensure Microsoft Project Integration with Web Timesheet works.