Source note · TLS versions and cipher support across UC platforms
Microsoft began deprecating TLS 1.0 and 1.1 for commercial Office 365 customers on October 15 2020, after starting in January 2020 for DoD and GCC High instances.
Checked 2026-10-02
- Vendor
- Microsoft
- Product
- Office 365
- Subsystem
- service TLS
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Checked
- 2026-10-02
Sources
- Preparing for TLS 1.2 in Office 365 and Office 365 GCC — Microsoft · tier 2 current vendor documentation · More information
Cite this note
APA
WarmTransfer. (2026, October 2). TLS versions and cipher support across UC platforms: source note tls-version-support-uc-o365-tls10-11-deprecated-2020. WarmTransfer. https://warmtransfer.net/knowledge/claims/tls-version-support-uc-o365-tls10-11-deprecated-2020
BibTeX
@misc{warmtransfer-claim-tls-version-support-uc-o365-tls10-11-deprecated-2020,
title = {TLS versions and cipher support across UC platforms: source note tls-version-support-uc-o365-tls10-11-deprecated-2020},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/tls-version-support-uc-o365-tls10-11-deprecated-2020},
note = {Source note tls-version-support-uc-o365-tls10-11-deprecated-2020, checked 2026-10-02}
}