How change access permissions

Those are settings for the application that leverages your Office 365 identity. You can get the info via Get-AzureADServicePrincipal or the Azure portal:

DeletionTimestamp                  :
ObjectId                           : 674bb85f-3f9d-4aa3-9d29-0ff76dcfc681
ObjectType                         : ServicePrincipal
AccountEnabled                     : True
AddIns                             : {}
AlternativeNames                   : {}
AppDisplayName                     : MS Tech Comm
AppId                              : 09213cdc-9f30-4e82-aa6f-9b6e8d82dab3
AppOwnerTenantId                   : 72f988bf-86f1-41af-91ab-2d7cd011db47
AppRoleAssignmentRequired          : False
AppRoles                           : {}
DisplayName                        : MS Tech Comm
ErrorUrl                           :
Homepage                           :
KeyCredentials                     : {}
LogoutUrl                          :
Oauth2Permissions                  : {}
PasswordCredentials                : {}
PreferredTokenSigningKeyThumbprint :
PublisherName                      : Microsoft
ReplyUrls                          : {https://techcommunity.microsoft.com/auth/oauth2callback}
SamlMetadataUrl                    :
ServicePrincipalNames              : {09213cdc-9f30-4e82-aa6f-9b6e8d82dab3}
ServicePrincipalType               : Application
Tags                               : {WindowsAzureActiveDirectoryIntegratedApp}

You can also revoke access for the application if needed. If you need more help about the whole Azure AD applications model, read here: https://docs.microsoft.com/en-us/azure/active-directory/develop/active-directory-application-objects