callRecord startDateTime (first user joined) and endDateTime (last user left) are ISO 8601 DateTimeOffset values that are always in UTC.

Checked 2026-09-24

Vendor
Microsoft
Product
Microsoft Teams
Subsystem
Graph callRecords API v1.0
Deployment
multi-tenant
Region
not restricted
Release range
current as of 2026-09-24
Checked
2026-09-24

Sources

Cite this note

APA

WarmTransfer. (2026, September 24). Cross-platform CDR normalization model: source note cdr-normalization-msgraph-callrecord-utc-iso8601. WarmTransfer. https://warmtransfer.net/knowledge/claims/cdr-normalization-msgraph-callrecord-utc-iso8601

BibTeX

@misc{warmtransfer-claim-cdr-normalization-msgraph-callrecord-utc-iso8601,
  title  = {Cross-platform CDR normalization model: source note cdr-normalization-msgraph-callrecord-utc-iso8601},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/cdr-normalization-msgraph-callrecord-utc-iso8601},
  note   = {Source note cdr-normalization-msgraph-callrecord-utc-iso8601, checked 2026-09-24}
}

Read in context