Apex Class Permissions for Users

The following table displays the permissions required by administrators for users:

Apex Class	Enabled
AP	TRUE
AbstractAdhocApprovalEngine	TRUE
AbstractAgreementTermExActionController	TRUE
AbstractApprovalContextActionController	TRUE
AbstractApprovalEmailController	TRUE
AbstractApprovalEngine	TRUE
AbstractApprovalEngineProcessTerm	TRUE
AbstractApprovalEngineTest	TRUE
AbstractApprovalsTest	TRUE
AbstractEngine	TRUE
AbstractQueryCallback	TRUE
AbstractSObjectApprovals	TRUE
AbstractSObjectApprovals2	TRUE
AdhocApprovalEngine	TRUE
AdhocApprovalGroup	TRUE
AdhocApprovalGroupFactory	TRUE
AdhocApprovalProcess	TRUE
AdhocApprovalProcessDTO	TRUE
AdhocApprovalProcessFactory	TRUE
AdhocApprovalTest	TRUE
AdhocApprovalTestSupport	TRUE
AdhocApprover	TRUE
AdhocApproverFactory	TRUE
AdhocProcessRuntimeController	TRUE
AdhocProcessRuntimeControllerTest	TRUE
AdhocProcessRuntimeSupport	TRUE
AgreementApprovalEmailController	TRUE
AgreementApprovalEmailControllerTest	TRUE
AgreementApprovalSummaryController	TRUE
AgreementApprovalSummaryControllerTest	TRUE
AgreementLIApprovalEmailControllerTest	TRUE
AgreementLIApprovalSummaryControllerTest	TRUE
AgreementLItemApprovalSummaryController	TRUE
AgreementLineItemApprovalEmailController	TRUE
AgreementTEApprovalEmailControllerTest	TRUE
AgreementTermExAddController	TRUE
AgreementTermExAddTest	TRUE
AgreementTermExApprovalEmailController	TRUE
AgreementTermExApprovalSummaryController	TRUE
AgreementTermExApprovalSummaryTest	TRUE
AgreementTermExApprovalsController	TRUE
AgreementTermExApprovalsTest	TRUE
AgreementTermExCancelController	TRUE
AgreementTermExCancelTest	TRUE
AgreementTermExEditController	TRUE
AgreementTermExEditTest	TRUE
AgreementTermExHistoryController	TRUE
AgreementTermExHistoryTest	TRUE
AgreementTermExPreviewController	TRUE
AgreementTermExPreviewTest	TRUE
AgreementTermExSubmitController	TRUE
AgreementTermExSubmitTest	TRUE
AgreementTermExWrapper	TRUE
ApprovalActionController2	TRUE
ApprovalActionTest2	TRUE
ApprovalAssigneeResolver	TRUE
ApprovalChildProcess	TRUE
ApprovalConfig	TRUE
ApprovalConfigTest	TRUE
ApprovalConstants	TRUE
ApprovalContext	TRUE
ApprovalContextCancelController	TRUE
ApprovalContextCancelTest	TRUE
ApprovalContextFactory	TRUE
ApprovalContextPreviewController	TRUE
ApprovalContextPreviewTest	TRUE
ApprovalContextSubmitController	TRUE
ApprovalContextSubmitTest	TRUE
ApprovalCustomConfig	TRUE
ApprovalCustomConfigTest	TRUE
ApprovalData	TRUE
ApprovalDataTest	TRUE
ApprovalDataTransferAgent	TRUE
ApprovalDeleteSupport	TRUE
ApprovalEmailHandler	TRUE
ApprovalEmailHandlerTest	TRUE
ApprovalEngine2	TRUE
ApprovalEngineBatchActionHandler	TRUE
ApprovalEngineConsolidationSupport	TRUE
ApprovalEngineFactory	TRUE
ApprovalEnginePrescanSupport	TRUE
ApprovalEnginePreviewHelper	TRUE
ApprovalEngineProcessAgreementTermEx	TRUE
ApprovalEngineProcessContextObject	TRUE
ApprovalEngineProcessContextQueueable	TRUE
ApprovalEngineProcessDealTerm	TRUE
ApprovalEngineProcessRequest	TRUE
ApprovalEngineProcessRequestQueueable	TRUE
ApprovalEngineStepSupport	TRUE
ApprovalEngineSubmitHelper	TRUE
ApprovalEngineSupport	TRUE
ApprovalEngineTestATE	TRUE
ApprovalEngineTestATESupport	TRUE
ApprovalEngineTestAgmt	TRUE
ApprovalEngineTestAgmtSupport	TRUE
ApprovalEngineTestOppty	TRUE
ApprovalEngineTestOpptySupport	TRUE
ApprovalHistoryController	TRUE
ApprovalHistoryControllerTest	TRUE
ApprovalHistorySupport	TRUE
ApprovalMatrixAssigneeSupport	TRUE
ApprovalMatrixGenerateController	TRUE
ApprovalMatrixGenerateTest	TRUE
ApprovalMatrixGenerator	TRUE
ApprovalMatrixResolver	TRUE
ApprovalMatrixSupport	TRUE
ApprovalMatrixViewController	TRUE
ApprovalMatrixViewTest	TRUE
ApprovalPolicySupport	TRUE
ApprovalProcess2	TRUE
ApprovalProcessDefnController	TRUE
ApprovalProcessDefnControllerTest	TRUE
ApprovalProcessDefnListController	TRUE
ApprovalProcessDefnListTest	TRUE
ApprovalProcessFactory	TRUE
ApprovalProcessFactoryTest	TRUE
ApprovalProcessFinalActionController	TRUE
ApprovalProcessFinalActionTest	TRUE
ApprovalProcessInitialActionController	TRUE
ApprovalProcessInitialActionTest	TRUE
ApprovalProcessInstance	TRUE
ApprovalProcessInstanceFactory	TRUE
ApprovalProcessQryHelper	TRUE
ApprovalProcessResolver	TRUE
ApprovalProcessResolverTest	TRUE
ApprovalProcessStepController	TRUE
ApprovalProcessStepControllerTest	TRUE
ApprovalProcessSupport	TRUE
ApprovalProcessTest2	TRUE
ApprovalQryHelper	TRUE
ApprovalRequestAttachmentController	TRUE
ApprovalRequestAttachmentTest	TRUE
ApprovalRequestEscalateController	TRUE
ApprovalRequestEscalateTest	TRUE
ApprovalRequestQryHelper	TRUE
ApprovalRequestQryHelperTest	TRUE
ApprovalRequestReassignController2	TRUE
ApprovalRequestReassignTest	TRUE
ApprovalRequestSupport	TRUE
ApprovalRequestsListController	TRUE
ApprovalRequestsListTest	TRUE
ApprovalRequiredCheck	TRUE
ApprovalRequiredCheckTest	TRUE
ApprovalRule2	TRUE
ApprovalRuleAssignee	TRUE
ApprovalRuleAssigneeFactory	TRUE
ApprovalRuleController	TRUE
ApprovalRuleControllerTest	TRUE
ApprovalRuleCriteriaEditController	TRUE
ApprovalRuleCriteriaEditControllerTest	TRUE
ApprovalRuleDimension	TRUE
ApprovalRuleDimensionController	TRUE
ApprovalRuleDimensionControllerTest	TRUE
ApprovalRuleDimensionFactory	TRUE
ApprovalRuleDimensionSupport	TRUE
ApprovalRuleEntry	TRUE
ApprovalRuleEntryController	TRUE
ApprovalRuleEntryControllerTest	TRUE
ApprovalRuleEntryFactory	TRUE
ApprovalRuleFactory	TRUE
ApprovalRuleSupport	TRUE
ApprovalRuleTest	TRUE
ApprovalStatusUpdateBatchJob	TRUE
ApprovalStatusUpdateBatchJobTest	TRUE
ApprovalSubprocess	TRUE
ApprovalSubstep	TRUE
ApprovalSummaryLaunchController	TRUE
ApprovalSummaryLaunchTest	TRUE
ApprovalSystemException	TRUE
ApprovalUserSupport	TRUE
ApprovalUserSupportTest	TRUE
ApprovalUtil2	TRUE
ApprovalsController	TRUE
ApprovalsControllerTest	TRUE
ApprovalsWebService	TRUE
ApprovalsWebServiceSupport	TRUE
ApprovalsWebServiceTest	TRUE
Assignee	TRUE
AssigneeCacheSupport	TRUE
AsyncActionInfoEmailController	TRUE
AsyncActionSupport	TRUE
AsyncActionSupportTest	TRUE
AsyncJobSupport	TRUE
AttachmentSupport	TRUE
AttachmentWrapper	TRUE
BackupAdminSupport	TRUE
BackupAdminSupportTest	TRUE
BackupApproverActionController	TRUE
BackupApproverActionTest	TRUE
BackupApproverController	TRUE
BackupApproverSupport	TRUE
BackupApproverTest	TRUE
BackupUserSearchController	TRUE
BackupUserSearchTest	TRUE
BatchPreviewApprovals	TRUE
BatchSubmitForApprovals	TRUE
BulkActionRequest	TRUE
BulkCtxObjectParam	TRUE
ChildSOSupport	TRUE
ClauseApprovalsWebService	TRUE
ClauseApprovalsWebServiceTest	TRUE
ContextApprovalEmailController	TRUE
ContextApprovalEmailControllerTest	TRUE
CriteriaCache	TRUE
CriteriaCacheTest	TRUE
CurrencySupport	TRUE
CurrencySupportTest	TRUE
CustomAssigneeInfo	TRUE
CustomAssigneeInfoTest	TRUE
CustomAssigneeSupport	TRUE
CustomClass	TRUE
CustomClassLoader	TRUE
CustomSOSupport	TRUE
DashboardSupport	TRUE
DashboardSupportTest	TRUE
DefaultQueryCallback	TRUE
ESAPISupport	TRUE
EmailRecipient	TRUE
EmailSupport	TRUE
EmailTemplateConstants	TRUE
EmailTemplateFactory	TRUE
EmailTemplateSupport	TRUE
EmailTemplateTest	TRUE
EscalationAssignee	TRUE
EscalationReminderEmailController	TRUE
EscalationReminderEmailControllerTest	TRUE
EscalationSupport	TRUE
EscalationWorkflowTest	TRUE
ExprSupport	TRUE
ExprTest	TRUE
FieldMetadata	TRUE
FileSupport	TRUE
FileSupportTest	TRUE
FormulaField	TRUE
FormulaFieldController	TRUE
FormulaFieldControllerTest	TRUE
FormulaFieldFactory	TRUE
FormulaFieldSupport	TRUE
IApprovalEngine	TRUE
InboundAttachmentHandlerTest	TRUE
InstanceUrlController	TRUE
LookupUserSupport	TRUE
ManagedObject	TRUE
ManagedObjectConstants	TRUE
ManagedObjectTest	TRUE
MiscClassTest	TRUE
MyApprovalsController	TRUE
MyApprovalsControllerTest	TRUE
MyApprovalsEmailController	TRUE
MyApprovalsEmailControllerTest	TRUE
MyApprovalsLaunchController	TRUE
MyApprovalsLaunchControllerTest	TRUE
NextLevelApproverController	TRUE
NextLevelApproverTest	TRUE
NullObject	TRUE
ObjectCache	TRUE
ObjectValue	TRUE
ObjectValueTest	TRUE
OneOrMoreItemsFailedException	TRUE
OpportunityApprovalSummaryController	TRUE
OpportunityApprovalSummaryTest	TRUE
OpportunityPartnersListController	TRUE
OpportunityPartnersListTest	TRUE
OpportunityProductsListController	TRUE
OpportunityProductsListTest	TRUE
OpptyApprovalEmailController	TRUE
OpptyApprovalEmailControllerTest	TRUE
PostInstallBatchApprovalProcesses	TRUE
PostInstallBatchApprovalRequests	TRUE
PostInstallBatchBackupApprovers	TRUE
PostInstallBatchCopyProcessId	TRUE
PostInstallBatchUpdDelegateApproverNames	TRUE
PostInstallScript	TRUE
PostInstallScriptTest	TRUE
PreviewSubmitApprovalsController	TRUE
PreviewSubmitApprovalsTest	TRUE
Property	TRUE
QuerySpec	TRUE
QuerySpecFactory	TRUE
ReassignUserSearchController	TRUE
ReassignUserSearchTest	TRUE
RelatedUserSupport	TRUE
ReminderInstanceSupport	TRUE
ReminderJob	TRUE
ReminderJobTest	TRUE
ReminderSupport	TRUE
ReminderTest	TRUE
ReminderTestSupport	TRUE
RuntimeContext	TRUE
SOQLConstants	TRUE
SOQLSupport	TRUE
SOQLTest	TRUE
SObjectApprovalContextParam	TRUE
SObjectApprovalContextParam2	TRUE
SObjectApprovals2SubmitController	TRUE
SObjectApprovals2SubmitTest	TRUE
SObjectApprovals2Test	TRUE
SObjectApprovalsController	TRUE
SObjectApprovalsController2	TRUE
SObjectApprovalsSample	TRUE
SObjectApprovalsSupport	TRUE
SObjectApprovalsTest	TRUE
SObjectConstants	TRUE
SObjectDescribeInfo	TRUE
SObjectMetadata	TRUE
SObjectMetadataTest	TRUE
SObjectSupport	TRUE
SObjectTest	TRUE
SearchFilter	TRUE
SearchFilterController	TRUE
SearchFilterControllerTest	TRUE
SearchFilterDetailController	TRUE
SearchFilterDetailControllerTest	TRUE
StepRule	TRUE
SubmissionComments	TRUE
SubmissionCommentsSupport	TRUE
SystemUtil	TRUE
SystemUtilTest	TRUE
TaskConstants	TRUE
TaskFactory	TRUE
TaskSupport	TRUE
TermExApproval	TRUE
TermExApprovalCloneController	TRUE
TermExApprovalCloneTest	TRUE
TermExApprovalController	TRUE
TermExApprovalControllerTest	TRUE
TermExApprovalFactory	TRUE
TermExApprovalFactoryTest	TRUE
TermExSupport	TRUE
TestSupport	TRUE
TransferInflightRequests	TRUE
TransferInflightRequestsQueueable	TRUE
UIAbstractSearchController	TRUE
UIAbstractSelectItemsController	TRUE
UIAssigneeController	TRUE
UIAssigneeControllerTest	TRUE
UIDataTableController	TRUE
UIDependsOnController	TRUE
UIDependsOnControllerTest	TRUE
UIDisplayFieldNamesController	TRUE
UIDisplayFieldNamesControllerTest	TRUE
UIEscalationAssigneeController	TRUE
UIPageConfig	TRUE
UIPageConfigTest	TRUE
UIPageControllerBase	TRUE
UIPageControllerBaseTest	TRUE
UIPageSupport	TRUE
UIReapprovalFilterController	TRUE
UIReapprovalFilterControllerTest	TRUE
UISearchControllerTest	TRUE
UISearchEmailTemplateController	TRUE
UISearchFilterController	TRUE
UISearchFilterControllerTest	TRUE
UISearchQueueController	TRUE
UISearchRoleController	TRUE
UISearchRuleController	TRUE
UISearchUserController	TRUE
UserContext	TRUE

For information on setting apex class permissions, refer to this Salesforce article.