Skip to main content

Changing the default permissions on a calendar to Reviewer

Updated 3/8/2005 to update local freebusy folder permissions to editor

Changing the default permissions on user’s calendars to reviewer is something that comes up now and again in different companies for different reasons. Automating this with script is relatively straight forward if you use the ACL.dll which you can get a copy of from the sample on CDOLive http://www.cdolive.com/aclviewer.htm.

Actually the day after I wrote the below script I found another utility that someone had created call setperm that gives you a nice GUI to this. As well as that it gives you the ability to change permissions on other folders other then the calendar. The original web site that hosted this utility seems to be gone now (which is a shame it because it had some good stuff) but you can still download the utility from http://www.slipstick.com/files/setperm.zip . There's also a third party application from Symprex that can do this go here for details.

If your still interested in the script version here it is it mostly based around http://support.microsoft.com/?kbid=240911 . Some ADSI has been added to select all the users from the GAL for a particular server in the servername variable and some file logging is done to track all the user that are updated. I’ve put a downloadable copy of the code here the script looks like

Public Const CdoDefaultFolderCalendar = 0
servername = wscript.arguments(0)
set conn = createobject("ADODB.Connection")
set com = createobject("ADODB.Command")
Set iAdRootDSE = GetObject("LDAP://RootDSE")
strNameingContext = iAdRootDSE.Get("configurationNamingContext")
strDefaultNamingContext = iAdRootDSE.Get("defaultNamingContext")
Conn.Provider = "ADsDSOObject"
Conn.Open "ADs Provider"
svcQuery = "<LDAP://" & strNameingContext &
">;(&(objectCategory=msExchExchangeServer)(cn=" & Servername &
"));cn,name,legacyExchangeDN;subtree"
Com.ActiveConnection = Conn
Com.CommandText = svcQuery
Set Rs = Com.Execute
while not rs.eof
GALQueryFilter = "(&(&(&(& (mailnickname=*)(!msExchHideFromAddressLists=TRUE)(|
(&(objectCategory=person)(objectClass=user)(msExchHomeServerName=" &
rs.fields("legacyExchangeDN") & ")) )))))"
strQuery = "<LDAP://" & strDefaultNamingContext & ">;" & GALQueryFilter &
";distinguishedName,mail,mailnickname;subtree"
com.Properties("Page Size") = 100
Com.CommandText = strQuery
Set Rs1 = Com.Execute
while not Rs1.eof
call dofreebusy(servername,rs1.fields("mailnickname"))
wscript.echo "Setting Permission on: " & rs1.fields("mailnickname")
rs1.movenext
wend
rs.movenext
wend
rs.close
set conn = nothing
set com = nothing
wscript.echo "Done"


function dofreebusy(servername,mailboxname)

Set objSession = CreateObject("MAPI.Session")
objSession.Logon "","",false,true,true,true,servername & vbLF & mailboxname
Set CdoInfoStore = objSession.GetInfoStore
Set CdoFolderRoot = CdoInfoStore.RootFolder
Set ACLObj = CreateObject("MSExchange.aclobject")
set cdocalendar = objSession.GetDefaultFolder(CdoDefaultFolderCalendar)
ACLObj.CDOItem = cdocalendar
Set FolderACEs = ACLObj.ACEs
getpermissions = mailboxname & ": "
For each fldace in FolderACEs
if fldace.ID = "ID_ACL_DEFAULT" then
fldace.rights = 1025
ACLObj.update
end if
getpermissions = getpermissions & fldace.ID & "-" & fldace.rights
Next
'FreeBusy Update
Set objRoot = objSession.GetFolder("")
Set objFreeBusyFolder = objRoot.Folders.Item("FreeBusy Data")
ACLObj.CDOItem = objFreeBusyFolder
Set FolderACEs = ACLObj.ACEs
For each fldace in FolderACEs
if fldace.ID = "ID_ACL_DEFAULT" then
fldace.rights = 1123
ACLObj.update
end if
Next

End function

Popular posts from this blog

The MailboxConcurrency limit and using Batching in the Microsoft Graph API

If your getting an error such as Application is over its MailboxConcurrency limit while using the Microsoft Graph API this post may help you understand why. Background   The Mailbox  concurrency limit when your using the Graph API is 4 as per https://docs.microsoft.com/en-us/graph/throttling#outlook-service-limits . This is evaluated for each app ID and mailbox combination so this means you can have different apps running under the same credentials and the poor behavior of one won't cause the other to be throttled. If you compared that to EWS you could have up to 27 concurrent connections but they are shared across all apps on a first come first served basis. Batching Batching in the Graph API is a way of combining multiple requests into a single HTTP request. Batching in the Exchange Mail API's EWS and MAPI has been around for a long time and its common, for email Apps to process large numbers of smaller items for a variety of reasons.  Batching in the Gr...
Read more

Sending a MimeMessage via the Microsoft Graph using the Graph SDK, MimeKit and MSAL

One of the new features added to the Microsoft Graph recently was the ability to create and send Mime Messages (you have been able to get Message as Mime for a while). This is useful in a number of different scenarios especially when trying to create a Message with inline Images which has historically been hard to do with both the Graph and EWS (if you don't use MIME). It also opens up using SMIME for encryption and a more easy migration path for sending using SMTP in some apps. MimeKit is a great open source library for parsing and creating MIME messages so it offers a really easy solution for tackling this issue. The current documentation on Send message via MIME lacks any real sample so I've put together a quick console app that use MSAL, MIME kit and the Graph SDK to send a Message via MIME. As the current Graph SDK also doesn't support sending via MIME either there is a workaround for this in the future my guess is this will be supported.
Read more

Export calendar Items to a CSV file using Microsoft Graph and Powershell

For the last couple of years the most constantly popular post by number of views on this blog has been  Export calendar Items to a CSV file using EWS and Powershell closely followed by the contact exports scripts. It goes to show this is just a perennial issue that exists around Mail servers, I think the first VBS script I wrote to do this type of thing was late 90's against Exchange 5.5 using cdo 1.2. Now it's 2020 and if your running Office365 you should really be using the Microsoft Graph API to do this. So what I've done is create a PowerShell Module (and I made it a one file script for those that are more comfortable with that format) that's a port of the EWS script above that is so popular. This script uses the ADAL library for Modern Authentication (which if you grab the library from the PowerShell gallery will come down with the module). Most EWS properties map one to one with the Graph and the Graph actually provides better information on recurrences then...
Read more
All sample scripts and source code is provided by for illustrative purposes only. All examples are untested in different environments and therefore, I cannot guarantee or imply reliability, serviceability, or function of these programs.

All code contained herein is provided to you "AS IS" without any warranties of any kind. The implied warranties of non-infringement, merchantability and fitness for a particular purpose are expressly disclaimed.