Update device-enrollment-manager-enroll.md

Update two important pieces of information as after we cross the 1000 devices mark, if we add one device then it deletes another. Reported by multiple users as well. So the total number is 1000 I presume, we can check with PG if need be.

Similarly, 150 active DEM accounts per tenant is also updated.

Author: msbemba

memdocs/intune/enrollment/device-enrollment-manager-enroll.md

@@ -33,7 +33,7 @@ ms.collection:
 
 # Enroll devices in Intune by using a device enrollment manager account
 
-You can enroll up to 1,000 devices with a single Azure Active Directory account by using a device enrollment manager (DEM) account. DEM is an Intune permission that can be applied to an Azure AD user account and lets the user enroll up to 1,000 devices. A DEM account is useful for scenarios where devices are enrolled and prepared before handing them out to the users of the devices. By design, there's a limit of 150 Device Enrollment Manager (DEM) accounts in Microsoft Intune.
+You can enroll up to 1,000 devices in total with a single Azure Active Directory account by using a device enrollment manager (DEM) account. DEM is an Intune permission that can be applied to an Azure AD user account and lets the user enroll up to 1,000 devices. A DEM account is useful for scenarios where devices are enrolled and prepared before handing them out to the users of the devices. By design, there's a limit of 150 active Device Enrollment Manager (DEM) accounts in Microsoft Intune.
 
 ## Limitations of devices that are enrolled with a DEM account