If you need to reassign a Property Manager (EG if a staff member leaves your Organisation) you can do so from the Properties button in the toolbar (or go through the Home Screen> Properties> Manage Properties).

Then, filter the Property Manager column to the manage who is leaving (or will be replaced by another manager). Once the Property Manager field has been filtered, click the Reassign Property Mgr button.
A white drop down box will appear where you will select the new Property Manager (that the Properties will be reassigned to). 

Click the  button again.
A pop-up box will appear to ask if you want to update the Properties. Click Yes to confirm, or No to discard. 

 Another pop up box will appear to confirm the Properties have been re-assigned to the selected Manager