SourceSideValidation improvements to Limits tests

PublicFolders/SourceSideValidations/Tests/Limit/Test-FolderLimit.ps1

@@ -44,13 +44,32 @@ function Test-FolderLimit {
                 Write-Progress @progressParams -Status $progressCount -PercentComplete ($progressCount * 100 / $FolderData.IpmSubtree.Count)
             }
 
+            # If we failed to get statistics for some reason, assume we have content
+            [int]$itemCount = 1
+            [Int64]$totalItemSize = 0
+            $aggregateChildItemCount = $aggregateChildItemCounts[$folder.EntryId]
+
             $stats = $FolderData.StatisticsDictionary[$folder.EntryId]
-            [int]$itemCount = $stats.ItemCount
-            [Int64]$totalItemSize = $stats.TotalItemSize
+            if ($null -ne $stats) {
+                [int]$itemCount = $stats.ItemCount
+                [Int64]$totalItemSize = $stats.TotalItemSize
+            } else {
+                $noStatisticsResult = @{
+                    TestName       = "Limit"
+                    Severity       = "Warning"
+                    ResultType     = "NoStatistics"
+                    FolderIdentity = $folder.Identity.ToString()
+                    FolderEntryId  = $folder.EntryId.ToString()
+                }
+                New-TestResult @noStatisticsResult
+            }
 
             $parent = $FolderData.EntryIdDictionary[$folder.ParentEntryId]
             if ($null -ne $parent) {
                 $aggregateChildItemCounts[$parent.EntryId] += $itemCount
+                if ($null -ne $aggregateChildItemCount) {
+                    $aggregateChildItemCounts[$parent.EntryId] += $aggregateChildItemCount
+                }
             }
 
             if ($itemCount -lt 1 -and $aggregateChildItemCounts[$folder.EntryId] -lt 1 -and $folder.FolderPathDepth -gt 0) {

PublicFolders/SourceSideValidations/Tests/Limit/Write-TestFolderLimitResult.ps1

@@ -17,6 +17,7 @@ function Write-TestFolderLimitResult {
         $itemCountResults = New-Object System.Collections.ArrayList
         $totalItemSizeResults = New-Object System.Collections.ArrayList
         $emptyFolderResults = New-Object System.Collections.ArrayList
+        $noStatisticsResults = New-Object System.Collections.ArrayList
         $hierarchyCountResult = $null
         $hierarchyAndDumpsterCountResult = $null
         $folderCountMigrationLimit = 250000
@@ -32,6 +33,7 @@ function Write-TestFolderLimitResult {
                 "TotalItemSize" { [void]$totalItemSizeResults.Add($TestResult) }
                 "HierarchyCount" { $hierarchyCountResult = $TestResult }
                 "HierarchyAndDumpsterCount" { $hierarchyAndDumpsterCountResult = $TestResult }
+                "NoStatistics" { [void]$noStatisticsResults.Add($TestResult) }
             }
         }
     }
@@ -79,5 +81,11 @@ function Write-TestFolderLimitResult {
                 "Folders contain no items and have only empty subfolders. " +
                 "These will not cause a migration issue, but they may be pruned if desired.")
         }
+
+        if ($noStatisticsResults.Count -gt 0) {
+            Get-ResultSummary -ResultType $noStatisticsResults[0].ResultType -Severity $noStatisticsResults[0].Severity -Count $noStatisticsResults.Count -Action (
+                "Public folder statistics could not be retreived for these folders. " +
+                "ItemCount, TotalItemSize, and EmptyFolder tests were skipped for these folders.")
+        }
     }
 }

docs/PublicFolders/SourceSideValidations.md

@@ -48,6 +48,7 @@ Limit|FolderPathDepth|The folder path is greater than 299 folders deep.
 Limit|HierarchyCount|There are more than 250,000 total folders in the hierarchy.
 Limit|HierarchyAndDumpsterCount|There are more than 250,000 total folders if you count both the folders and their dumpsters.
 Limit|ItemCount|The folder has more than 1,000,000 items.
+Limit|NoStatistics|Get-PublicFolderStatistics did not return any statistics for these folders. ItemCount, TotalItemSize, and EmptyFolder tests were skipped.
 Limit|TotalItemSize|The items directly in this folder (not child folders) add up to more than 25 GB.
 MailEnabledFolder|MailDisabledWithProxyGuid|The folder is not mail-enabled, but it has the GUID of an Active Directory object in its MailRecipientGuid property.
 MailEnabledFolder|MailEnabledSystemFolder|The folder is a system folder, which should not be mail-enabled.