For new users
You can enable Inventory Management only in Simple CRM mode. It is not yet possible in Classic CRM mode (opportunities+prospects).
For existing users
If you are working in Deals+Orders mode and want to enable saudi arabia mobile number list Inventory Management , you will first need to change the mode to Deals in CRM Settings.
NOTE : You cannot switch back to Quotes+Orders mode as it is no longer supported in Bitrix24.
If you are using Classic CRM mode (opportunities+leads) and want to enable Inventory Management, you need to change the mode to Simple CRM.
How to enable Inventory Management

If you are already working with Inventory Management and have enabled Deals+Orders mode, Inventory Management will continue to work.
However, you will not be able to use the new booking modes and will only have access to the old settings.
Also, if you are already using quantitative accounting, it will continue to work without change.
However, if you disable this option, you cannot re-enable it and will be required to use Inventory Management.