Enable SIP X header support for context transfer

Publisher

Microsoft

URL

https://learn.microsoft.com/en-us/dynamics365/release-plan/2025wave2/service/dynamics365-contact-center/enable-sip-x-header-support-context-transfer

Published

2026-02-24

Updated

unknown

Accessed

2026-10-02

HTTP status

200

License

Microsoft Learn terms of use; no-redistribution; short excerpts and locators only

Source notes citing this source

• Dynamics 365 Contact Center SIP X header context transfer is described for environments using Direct Routing telephony. in context
• Dynamics 365 Contact Center allows at most five SIP X headers per call, for incoming calls and for external phone number transfers. in context
• Before SIP X header support, the SIP UUI field with a 128-character limit was the only way to pass call context in Dynamics 365 Contact Center. in context
• SIP X header support for context transfer in Dynamics 365 Contact Center became generally available on 23 February 2026, enabled automatically. in context
• In Dynamics 365 Contact Center a SIP X header name is limited to 64 characters and its value to 256 characters. in context

Cite this source record

APA

WarmTransfer. (2026, February 24). Enable SIP X header support for context transfer. WarmTransfer. https://warmtransfer.net/knowledge/sources/ms-learn-d365-cc-sip-x-header-context

BibTeX

@misc{warmtransfer-ms-learn-d365-cc-sip-x-header-context,
  title  = {Enable SIP X header support for context transfer},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/ms-learn-d365-cc-sip-x-header-context},
  note   = {Microsoft, accessed 2026-10-02}
}