list-supported-time-zones
list-supported-time-zonesRetrieve the list of time zones supported by a user's mailbox server, available in Windows or IANA format, to validate or select the user's preferred time zone.
Instructions
Get the list of time zones that are supported for the user, as configured on the user's mailbox server. You can explicitly specify to have time zones returned in the Windows time zone format or Internet Assigned Numbers Authority (IANA) time zone (also known as Olson time zone) format. The Windows format is the default. When setting up an Outlook client, the user selects the preferred time zone from this supported list. You can subsequently get the preferred time zone by getting the user's mailbox settings.
💡 TIP: Lists time zones the user's mailbox server supports. TimeZoneStandard path parameter must be one of: Windows (default — Windows time zone names like 'Pacific Standard Time'), or Iana (IANA / Olson names like 'America/Los_Angeles'). Note the PascalCase — the values are case-sensitive enums, not lowercase strings. Returns timeZoneInformation objects with alias and displayName. Use the result to validate or look up the value before calling update-mailbox-settings to change the user's preferred timeZone — the format must match what the server expects.
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| top | No | Page size (Graph $top). Start small (e.g. 5–15) so responses fit the model context; raise only if needed. Use $select to return fewer fields per item. For more rows, use @odata.nextLink from the response instead of a very large $top. | |
| skip | No | Items to skip for pagination. Not supported with $search. | |
| count | No | Set true to enable advanced query mode (ConsistencyLevel: eventual). Required for complex $filter on flag/flagStatus or contains(). | |
| filter | No | OData filter expression. Add $count=true for advanced filters (flag/flagStatus, contains()). Cannot combine with $search. | |
| search | No | KQL search query — wrap value in double quotes. Cannot combine with $filter. | |
| fetchAllPages | No | Follow @odata.nextLink and merge up to 100 pages into one response. Can return enormous payloads—only when the user explicitly needs a full export. Prefer a small $top first, then paginate or narrow with $filter/$search. | |
| includeHeaders | No | Include response headers (including ETag) in the response metadata | |
| excludeResponse | No | Exclude the full response body and only return success or failure indication | |
| TimeZoneStandard | Yes | Path parameter: TimeZoneStandard |