To avoid issues with Exchange Web Services, especially in hybrid configuration, configure 100-continue handling to comply with RFC-7231 instead of the standard setting of RFC-2616.

To resolve this issue, apply the following setting on the LoadMaster.

100-Continue handling = RFC-7231 Complaint

To select RFC-7231 Compliant globally, follow the steps below:

  1. In the main menu of the LoadMaster WUI, go to System Configuration > Miscellaneous Options > L7 Configuration.

  2. Select RFC-7231 Complaint under 100-Continue Handling.