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Outlook sink issue in browser

  • July 15, 2025
  • 1 reply
  • 120 views

mohit9234
Netskope Partner

Hi Team,

I’ve observed an issue where Outlook on the browser does not receive new emails when the Netskope client is enabled. However, at the same time, the Outlook desktop application continues to receive emails without any problem.

This leads me to believe that the Netskope client might be interfering with mail synchronization on the browser. Could you please help investigate and provide a solution for this?

Best answer by venkatesanek

Hi ​@mohit9234 ,

OWA (Outlook web application) uses HTTP streaming connection for Auto-sync feature and the HTTP streaming gets interrupted when it undergoes content inspection. 

Kindly implement the workaround suggested in below KB article.

Streamed response content held at proxy -Site/app inaccessible

If issue still persists after implementing the workaround suggested in KB article, please contact our support team.

1 reply

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  • Netskope Employee
  • Answer
  • August 11, 2025

Hi ​@mohit9234 ,

OWA (Outlook web application) uses HTTP streaming connection for Auto-sync feature and the HTTP streaming gets interrupted when it undergoes content inspection. 

Kindly implement the workaround suggested in below KB article.

Streamed response content held at proxy -Site/app inaccessible

If issue still persists after implementing the workaround suggested in KB article, please contact our support team.