r

Read access. 

w

Write access, including adding new items and modifying existing items. 

d

Delete access. 

s

Schedule (invite) access. Requests can be made, replies will be accepted, and other ITIP scheduling interactions will be honored. 

f

Free/busy (availability) access only. Free/busy access means that a user can see scheduled time on a calendar, but is not allowed to see the event details. Instead, only the words “Not Available” appear by a scheduled time block. Blocks of time without any scheduled events are listed with the word “Available” next to them. 

l 

Lookup access for a domain. 

e

Act on behalf of for reply access. This type grants a user the right to accept or decline invitations on behalf of the calendar’s primary owner. This type of access does not need to be granted explicitly because it is implied when a user is designated as an owner (an owner other than the primary owner) of a calendar. 

i

Act on behalf of for invite access. This type grants a user the right to create and modify components in which other attendees have been invited on behalf of the calendar's primary owner. This type of access does not need to be granted explicitly because it is implied when a user is designated as an owner (an owner other than the primary owner) of a calendar. 

c

Act on behalf of for cancel access. This type grants a user the right to cancel components to which attendees have been invited on behalf of the calendar's primary owner. This type of access does not need to be granted explicitly because it is implied when a user is designated as an owner (an owner other than the primary owner) of a calendar. 

z

Self-administrating access - the authenticated user is granted the ability to add or remove an Access Control Entry. Users with this privilege can add and remove privileges for themselves. For example, UserA may not have write access to UserB’s calendar, but UserA has been granted self-administrating access to UserB’s calendar. Therefore, UserA can add an Access Control Entry that grants himself write access to UserB’s calendar. 

Note: This privilege does not allow UserA to grant other users access to UserB's calendar. For example, the self-administrating privilege does not allow UserA to grant UserC access to UserB’s calendar.