| AccountNotFoundException | Thrown when the account could not be found during an authentication attempt. |
| ApplicationNotFoundException | Thrown when an application is not found. |
| CrowdException | CrowdException is the superclass of Crowd-specific exceptions
that must be caught. |
| DirectoryCurrentlySynchronisingException | Thrown when an operation failed because the directory is currently synchronising. |
| DirectoryInstantiationException | Exception when a com.atlassian.crowd.directory.RemoteDirectory implementation can not be loaded by a Directory. |
| DirectoryNotFoundException | Thrown when a directory could not be found |
| ExpiredCredentialException | Thrown when the credentials have expired. |
| FailedAuthenticationException | |
| GroupNotFoundException | Thrown when the specified group could not be found. |
| InactiveAccountException | Thrown when the account is inactive. |
| InvalidCredentialException | Thrown when the supplied credential is not valid. |
| InvalidCrowdServiceException | Thrown when a Crowd client is not communicating with a valid Crowd service. |
| InvalidMembershipException | Thrown when a user tries to create a Nested Group membership that is not valid. |
| InvalidUserException | |
| MembershipNotFoundException | Used to denote that a particular USER-GROUP or GROUP-GROUP membership does not exist. |
| ObjectNotFoundException | Thrown when an entity is not found. |
| OperationFailedException | Represents an error when executing an operation on the remote directory failed for some reason. |
| OperationNotPermittedException | Thrown when the operation is not permitted. |
| OperationNotSupportedException | Checked exception thrown if the requested operation is not supported. |
| ReadOnlyGroupException | Thrown when a directory is asked to modify a group or its memberships which cannot be modified. |
| UnsupportedCrowdApiException | Failure because this API call is only supported by a later version of Crowd. |
| UserNotFoundException | Thrown when the specified user could not be found. |