=== Locked by [[MRO_Objects_(Client)#Locking|hierarchy]] ===
By design, an MRO object is locked if its parent MRO work package is confirmed. This type of locking is applied recursively to all child MRO objects.
=== Locked by sequence ===
An MRO task can also be locked if it belongs to a sequential list of tasks that must be completed in order, in this case all tasks but the current one are locked.
== Locking through access rights ==
=== Locked by [[Exclusive_Access_Content_(Client)|Exclusive exclusive access]]{{Version/WinXSince|4.1}} ===
Objects may have exclusive access, allowing only a single user to edit it by checking it out, for all other users this objects is locked and can not be edited.
=== Locked by [[User_Rights|User user rights]] ===
If a user does not have the necessary right to write to, or even read the contents of an object this object appears locked. This can apply to groups of objects, single objects or even properties of objects.