Users Calendars Access

Users - Calendars - Access

• Notes
• API documentation
• Definitions
• Calendar selection
• Manage calendar access
• Display calendar access
• Transfer calendar ownership

Notes

Calendar ACL roles (as seen in Calendar GUI):

• reader - See all event details
• writer & editor Make changes to events
• owner - Make changes to events and manage sharing
• freebusy & freebusyreader - See only free/busy (hide details)

API documentation

• Calendar API - ACLs

Definitions

• <UserTypeEntity>

<DomainName> ::= <String>(.<String>)+
<EmailAddress> ::= <String>@<DomainName>
<CalendarItem> ::= <EmailAddress>
<CalendarList> ::= "<CalendarItem>(,<CalendarItem>)*"
<CourseAlias> ::= <String>
<CourseID> ::= <Number>|d:<CourseAlias>
<CourseIDList> ::= "<CourseID>(,<CourseID>)*"
<CourseState> ::= active|archived|provisioned|declined
<CourseStateList> ::= all|"<CourseState>(,<CourseState>)*"
<ResourceID> ::= <String>
<ResourceIDList> ::= "<ResourceID>(,<ResourceID>)*"
<TimeZone> ::= <String>
        See: https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
<UniqueID> ::= id:<String>
<UserItem> ::= <EmailAddress>|<UniqueID>|<String>

<CalendarAttribute> ::=
        (backgroundcolor <ColorValue>)|
        (color <CalendarColorName>)|
        (colorindex|colorid <CalendarColorIndex>)|
        (foregroundcolor <ColorValue>)|
        (hidden <Boolean>)|
        (notification clear|(email <CalendarEmailNotificatonEventTypeList>))|
        (reminder clear|(email|pop <Number>)|(<Number> email|pop))|
        (selected <Boolean>)|
        (summary <String>)

<CalendarSettings> ::=
        (description <String>)|
        (location <String>)|
        (summary <String>)|
        (timezone <TimeZone>)

<CalendarACLRole> ::=
         editor|freebusy|freebusyreader|owner|reader|writer
<CalendarACLScope> ::=
        <EmailAddress>|user:<EmailAdress>|group:<EmailAddress>|
         domain:<DomainName>|domain|default
<CalendarACLScopeList> ::=
        "<CalendarACLScope>(,<CalendarACLScope>)*"
<CalendarACLScopeEntity>::=
        <CalendarACLScopeList> | <FileSelector> | <CSVkmdSelector> | <CSVDataSelector>

<CalendarSelectProperty> ::=
        minaccessrole <CalendarACLRole>|
        showdeleted|
        showhidden

<UserCalendarEntity> ::=
        allcalendars|
        primary|
        <EmailAddress>|
        <UniqueUD>|
        (courses <CourseIDList>)|
        ((courses_with_teacher <UserItem>)|my_courses_as_teacher
          [coursestates <CourseStateList>])|
        ((courses_with_student <UserItem>)|my_courses_as_student
          [coursestates <CourseStateList>])|
        (resource <ResourceID>)|
        (resources <ResourceIDList>)|
        ((calendars <CalendarList>) | <FileSelector> | <CSVFileSelector> |
                                      <CSVkmdSelector> | <CSVDataSelector>)|
        <CalendarSelectProperty>+

Calendar selection

• allcalendars - All calendars in a user's calendar list
• primary - The user's primary calendar
• <EmailAddress> - The address of a calendar in a user's calendar list
• <UniqueID> - The uniqueid of a calendar in a user's calendar list
• courses <CourseIDList>- The calendars associated with a list of courses
• courses_with_teacher <UserItem> - The calendars associated with courses with <UserItem> as a teacher
• my_courses_as_teacher - The calendars associated with the User from <UserTypeEntity> as a teacher
• courses_with_student <UserItem> - The calendars associated with courses with <UserItem> as a student
• my_courses_as_student - The calendars associated with the User from <UserTypeEntity> as a student
• coursestates <CourseStateList> - Used with the previous four options to select courses in a particular state; the default is all
• resource <ResourceID> - The calendar associated with a resource ID
• resources <ResourceIDList> - The calendars associated with a list of resource IDs
• calendars (<CalendarList> | <FileSelector> | <CSVFileSelector> | <CSVkmdSelector> | <CSVDataSelector>) - A collection of calendars: Collections of Items
• <CalendarSelectProperty>+ - The calendars in a user's calendar list with the specified properites

Manage calendar access

gam <UserTypeEntity> add calendaracls <UserCalendarEntity>
        <CalendarACLRole> <CalendarACLScopeEntity> [sendnotifications <Boolean>]
gam <UserTypeEntity> update calendaracls <UserCalendarEntity>
        <CalendarACLRole> <CalendarACLScopeEntity> [sendnotifications <Boolean>]
gam <UserTypeEntity> delete calendaracls <UserCalendarEntity>
        [<CalendarACLRole>] <CalendarACLScopeEntity>

By default, when you add or update a calendar ACL, notification is sent to the members referenced in the <CalendarACLScopeEntity>. Use sendnotifications false to suppress sending the notification.

Display calendar access

gam <UserTypeEntity> info calendaracls <UserCalendarEntity>
        <CalendarACLScopeEntity> [formatjson]
gam <UserTypeEntity> show calendaracls <UserCalendarEntity>
        [noselfowner]
        [formatjson]

Option noselfowner suppresses the display of ACLs that reference the calendar itself as its owner.

By default, Gam displays the information as an indented list of keys and values.

• formatjson - Display the fields in JSON format.

gam <UserTypeEntity> print calendaracls <UserCalendarEntity> [todrive <ToDriveAttribute>*]
        [noselfowner] (addcsvdata <FieldName> <String>)*
        [formatjson [quotechar <Character>]]

Option noselfowner suppresses the display of ACLs that reference the calendar itself as its owner.

Add additional columns of data from the command line to the output

• addcsvdata <FieldName> <String>

By default, when writing CSV files, Gam uses a quote character of double quote ". The quote character is used to enclose columns that contain the quote character itself, the column delimiter (comma by default) and new-line characters. Any quote characters within the column are doubled. When using the formatjson option, double quotes are used extensively in the data resulting in hard to read/process output. The quotechar <Character> option allows you to choose an alternate quote character, single quote for instance, that makes for readable/processable output. quotechar defaults to gam.cfg/csv_output_quote_char. When uploading CSV files to Google, double quote " should be used.

Transfer calendar ownership

You can transfer ownership of calendars from one user to another; only non-primary calendars owned by the source user can be transferred.

This capability is no longer available, see: https://developers.google.com/workspace/calendar/release-notes#October_27_2025

Data ownership can be transferred in the Google Calendar UI.