set-OnPremDLPermissions.ps1

<#
    .SYNOPSIS
 
    This function sets the multi valued attributes of the DL
 
    .DESCRIPTION
 
    This function sets the multi valued attributes of the DL.
    For each of use - I've combined these into a single function instead of splitting them out.
 
    .PARAMETER allSendAs
 
    All of the send as permissions for other objects in Office 365.
 
    .PARAMETER allFullMailboxAccess
 
    All of the full mailbox access permissions for other objects in Office 365.
 
    .OUTPUTS
 
    None
 
    .EXAMPLE
 
    set-Office365DLPermissions -allSendAs SENDAS -allFullMailboxAccess FULLMAILBOXACCESS
 
    #>

    Function set-OnPremDLPermissions
    {
        [cmdletbinding()]

        Param
        (
            [Parameter(Mandatory = $true)]
            [AllowEmptyCollection()]
            [array]$allOnPremSendAs=$NULL,
            [Parameter(Mandatory = $true)]
            [AllowEmptyCollection()]
            [array]$allOnPremFullMailboxAccess=$NULL,
            [Parameter(Mandatory = $true)]
            [AllowEmptyCollection()]
            [array]$allOnPremFolderPermissions=$NULL,
            [Parameter(Mandatory = $TRUE)]
            [string]$groupSMTPAddress
        )

        [string]$isTestError="No"

        #Declare function variables.

        #Start processing the recipient permissions.
       
        Out-LogFile -string "********************************************************************************"
        Out-LogFile -string "START set-OnPremDLPermissions"
        Out-LogFile -string "********************************************************************************"

        #Determine if send as is populated and if so reset permissiosn.

        if ($allOnPremSendAs -ne $NULL)
        {
            $isTestError = "No"
            out-logfile -string "There are objects that have send as rights - processing."

            foreach ($permission in $allOnPremSendAs)
            {
                out-logfile -string ("Processing permission identity = "+$permission.identity)
                out-logfile -string ("Processing permission trustee = "+$permission.user)

                try {
                    add-adPermission -identity $permission.identity -user $permission.user -AccessRights ExtendedRight -ExtendedRights "Send As" -confirm:$FALSE -errorAction Stop
                }
                catch {
                    out-logfile -string "Unable to add the recipient permission send as on premises."
                    $isTestError = "Yes"
                    out-logfile -string $_
                    $errorMessageDetail = $_
                }
            }

            if ($isTestError -eq "Yes")
            {
                out-logfile -string "Error adding migrated mail contact to send as permissions on premises."

                $isErrorObject = new-Object psObject -property @{
                    permissionIdentity = $permission.Identity
                    attribute = "Send As Permission"
                    errorMessage = "Unable to add the migrated distribution list mail contact with send as permissions to groups sourced on onPremRecipientSendAs."
                    errorMessageDetail = $errorMessageDetail
                }
    
                out-logfile -string $isErrorObject
    
                $global:OnPremReplacePermissionsErrors+=$isErrorObject
            }
        }
        else 
        {
            out-logfile -string "There are no send as permissions to process."    
        }

        
    
        

        if ($allOnPremFullMailboxAccess -ne $NULL)
        {
            $isTestError = "No"

            out-logfile -string "There are objects that have full mailbox access rights - processing."

            try {
                foreach ($permission in $allOnPremFullMailboxAccess)
                {
                    out-logfile -string ("Processing permission identity = "+$permission.identity)
                    out-logfile -string ("Processing permission trustee = "+$permission.user)
                    out-logfile -string ("Processing permission access rights = "+$permission.AccessRights)

                    add-MailboxPermission -identity $permission.identity -user $permission.user -accessRights $permission.accessRights -confirm:$FALSE -errorAction Stop
                }
            }
            catch {
                out-logFile -string "Unable to add the full mailbox access permission in Office 365."
                out-logfile -string $_
                $isTestError="Yes"
                $errorMessageDetail=$_
            }

            if ($isTestError -eq "Yes")
            {
                out-logfile -string "Error processing full mailbox access rights on premises (migrated mail contact) for migrated DL."

                $isErrorObject = new-Object psObject -property @{
                    permissionIdentity = $permission.Identity
                    attribute = "Mailbox Folder Permission"
                    errorMessage = "Unable to add the migrated distribution list with full mailbox access permissions to resource. Manaul add required."
                    errorMessageDetail = $errorMessageDetail
                }

                out-logfile -string $isErrorObject

                $global:onPremReplacePermissionsErrors+=$isErrorObject
            }
        }
        else 
        {
            out-logfile -string "There are no full mailbox access permissions to process."    
        }
        
        
    
        

        if ($allOnPremFolderPermissions -ne $NULL)
        {
            out-logfile -string "Processing mailbox folder permissions on Premises."

            foreach ($permission in $allOnPremFolderPermissions)
            {
                $isTestError = "No"
                
                try {
                    out-logfile -string ("Processing permission identity = "+$permission.identity)
                    out-logfile -string ("Processing permission trustee = "+$permission.user)
                    out-logfile -string ("Processing permissions folder = "+$permission.folderName)
                    out-logfile -string ("Processing permission access rights = "+$permission.AccessRights)

                    add-MailboxFolderPermission -identity $permission.identity -user $permission.user -accessRights $permission.AccessRights -confirm:$FALSE -errorAction Stop
                }
                catch {
                    out-logFile -string "Unable to add mailbox folder permissions on premises for migrated mail contact."
                    out-logfile -string $_
                    $isTestError="Yes"
                    $errorMessageDetail=$_
                }
            }

            if ($isTestError -eq "Yes")
            {
                out-logfile -string "Unable to add mailbox folder permissions on premises for migrated mail contact.."

                $isErrorObject = new-Object psObject -property @{
                    permissionIdentity = $permission.Identity
                    attribute = "Mailbox Folder Permission"
                    errorMessage = "Unable to add the migrated distribution list with mailbox folder permissions to resource. Manaul add required."
                    errorMessageDetail = $errorMessageDetail
                }

                out-logfile -string $isErrorObject

                $global:onPremReplacePermissionsErrors+=$isErrorObject
            }
        }
        else 
        {
            out-logfile -string "There are no full mailbox access permissions to process."  
        }

        Out-LogFile -string "END set-OnPremDLPermissions"
        Out-LogFile -string "********************************************************************************"
    }