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Support Article

EWS connectivity not established despite correct NTLM credential



Exchange Web Services (EWS) connectivity is not established despite using the correct NTLM credentials.

Error Messages

401 Error - Unauthorized

Steps to Reproduce

Use EWS endpoint URL in Connect-SOAP and click Test Connectivity.

Root Cause

A defect in Pegasystems’ code or rules.


Perform the following local-change when the Test Connectivity button does not perform an actual SOAP run using NTLM authentication:

Write an Activity that calls this Connect-SOAP rule and pass the correct Clipboard parameters page.


Published July 23, 2018 - Updated October 8, 2020

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