Flexible Time Restrictions

Formulas

The ResultLookup function is not supported for non-standard time periods such as week-level granularity and user-managed time dimensions.
The IF function is not supported for non-standard time periods such as week-level granularity and user-managed time dimensions.
The If and ResultLookup functions are only working if member is unique below a single parent. If the member is present under multiple parents, the formulas are invalid.
For the CAGR function, years must be integers. 2021.3 or YearOne, for instance, are invalid.

Hierarchies that include non-standard user-managed time dimensions (that use the semantic type Other) won't be available for date ranges.
You won't be able to edit the custom current date if you change to a hierarchy that doesn't include the granularity that was previously used. For example, you set a date based on Quarter and then choose a hierarchy that doesn't have Quarter. You can delete the custom current date, but you can't edit it.
When you have dates with no value, they will still be included in date range look back.

For example, your user-managed time dimension has values for weekdays only, not weekends. Your lookback will include the weekend days.

If you are copy and pasting values in a table with a model that is using custom time hierarchies, only the overall values can be pasted to cells with different time hierarchies.
When creating copy rules for a copy step in data actions, copying to non-leaf target members on user-managed time dimensions is not supported at this time.
If you use a model with user-managed time dimensions to define the context of a calendar event, the filters of the time dimension won't be applied to the attached story.

The Difference From formula won't be supported for the initial release.
Variances don't work as expected for hierarchies that include non-standard user-managed time dimensions that use the semantic type “Other”. You will need to choose a hierarchy that uses only standard time dimensions.

Smart Insights is not supported for user-managed dimensions, or dimensions that support week granularity and/or week patterns to show users how data points change over time. Flexible time dimensions are supported for top contributor and calculation insights.
Search to Insight will ignore models containing user-managed dimensions, or dimensions that support week granularity and/or week patterns.

Stories containing flexible time dimensions, if set to Optimized iOS mode, can be consumed on supported iOS devices. Stories set to the non-optimized mode are not supported.