Source note · Web proxies and TLS inspection that break UC clients
The Get-PacFile PowerShell script generates two PAC file types: type 1 sends Optimize endpoint traffic direct and everything else to the proxy, and type 2 sends both Optimize and Allow endpoint traffic direct.
Checked 2026-10-14
- Vendor
- Microsoft
- Product
- Microsoft 365
- Subsystem
- proxy configuration
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-10-14
- Checked
- 2026-10-14
Sources
- Managing Microsoft 365 endpoints — Microsoft · tier 2 current vendor documentation · Use a PAC file for direct routing of vital Microsoft 365 traffic, PAC type table
Cite this note
APA
WarmTransfer. (2026, October 14). Web proxies and TLS inspection that break UC clients: source note tls-inspection-uc-clients-m365-getpacfile-types. WarmTransfer. https://warmtransfer.net/knowledge/claims/tls-inspection-uc-clients-m365-getpacfile-types
BibTeX
@misc{warmtransfer-claim-tls-inspection-uc-clients-m365-getpacfile-types,
title = {Web proxies and TLS inspection that break UC clients: source note tls-inspection-uc-clients-m365-getpacfile-types},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/tls-inspection-uc-clients-m365-getpacfile-types},
note = {Source note tls-inspection-uc-clients-m365-getpacfile-types, checked 2026-10-14}
}