microsoft/CSS-Exchange

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Exchange Server support tools and scripts

Stars: 1.3k
Forks: 395
Open beginner issues: 0
Indexed issues: 122
Avg merge: 14h 7m
Merged PRs (30d): 5

Dominant language: PowerShell
License: MIT
Last GitHub push: Sep 14, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue help wanted

Beginner friendly Everything

Open All

122 open issues indexed

Adopt shared Connect-EXOAdvanced in remaining EXO callers (ValidateEXOPFDumpster.ps1, CrossTenantMailboxMigrationValidation.ps1) Open

bug Public Folders Triage Work - Quick Change

Difficulty 4/5 3-5 days Newbie friendliness 68/100

microsoft/CSS-Exchange#2594 · Opened Sep 18, 2026
Adopt shared Connect-EXOAdvanced in PublicFolders/Migration/ToMicrosoft365Groups/* scripts Open

bug Public Folders Triage Work - Medium Change

Difficulty 4/5 3-5 days Newbie friendliness 72/100

microsoft/CSS-Exchange#2593 · Opened Sep 18, 2026
Adopt shared Connect-EXOAdvanced in PublicFolders/MailPublicFolderSync/* scripts Open

bug Public Folders Triage Work - Medium Change

Difficulty 4/5 3-5 days Newbie friendliness 58/100

microsoft/CSS-Exchange#2592 · Opened Sep 18, 2026
Finish and merge the shared M365 connection helper (PR #2090) — including Pester coverage Open

Enhancement Pester Public Folders Shared Function Triage Work - Medium Change

Difficulty 5/5 Over a week Newbie friendliness 25/100

microsoft/CSS-Exchange#2591 · Opened Sep 18, 2026
Standardize Exchange Online / Graph connection logic in a shared helper (adopt across all EXO-connecting scripts) Open

Enhancement Public Folders Shared Function Triage Work - Large Change

Difficulty 5/5 Over a week Newbie friendliness 35/100

microsoft/CSS-Exchange#2590 · Opened Sep 18, 2026
[Issue]Update autodetect URI to new endpoint Open

Issue

microsoft/CSS-Exchange#2583 · 1 assignee · Opened Sep 10, 2026
[Issue] - Health Checker wrong finding: dynamic memory detected Open

Health Checker Issue

Difficulty 3/5 1-2 days Newbie friendliness 58/100

microsoft/CSS-Exchange#2575 · 1 comment · Opened Aug 16, 2026
Add a formatter check to disallow backtick line continuation Open

Build Process Enhancement

Difficulty 3/5 1-2 days Newbie friendliness 72/100

microsoft/CSS-Exchange#2573 · Opened Aug 6, 2026
Extend CheckTokenTypeCasing to enforce lowercase Type token casing Open

Build Process Enhancement

Difficulty 3/5 1-2 days Newbie friendliness 74/100

microsoft/CSS-Exchange#2572 · 1 comment · Opened Aug 6, 2026
[Issue] - Health Checker - Missing detection of legacy sec groups in TXT output. Open

Health Checker Issue

Difficulty 3/5 1-2 days Newbie friendliness 55/100

microsoft/CSS-Exchange#2567 · 1 comment · Opened Jul 16, 2026
[Issue] - Health Checker Open

Health Checker Issue

Difficulty 4/5 3-5 days Newbie friendliness 32/100

microsoft/CSS-Exchange#2563 · 2 comments · Opened Jul 1, 2026
Collect the Issuer of Certifiate in health checker certificate config dump Open

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

microsoft/CSS-Exchange#2562 · Opened Jun 30, 2026
Add a new check of the NIC Receive Buffers Open

Difficulty 3/5 1-2 days Newbie friendliness 50/100

microsoft/CSS-Exchange#2560 · Opened Jun 24, 2026
[Work Item] Health Checker: Detect Exchange Well Known Security Groups with incorrect GroupType (non-Universal) Open

Health Checker P1 Work Item

Difficulty 4/5 3-5 days Newbie friendliness 55/100

microsoft/CSS-Exchange#2557 · Opened Jun 16, 2026
[Work Item] Pester test gap: Get-FilteredSettingOverrideInformation fallback path untested Open

Health Checker Pester Work Item

Difficulty 4/5 3-5 days Newbie friendliness 72/100

microsoft/CSS-Exchange#2555 · Opened Jun 16, 2026
HealthChecker: False positive "Duplicate Overrides" error when ServerMismatch overrides exist Open

Health Checker Issue

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

microsoft/CSS-Exchange#2554 · Opened Jun 12, 2026
[Issue] - Health Checker - Memory Size / Capacity Open

Awaiting feedback Health Checker Issue

Difficulty 3/5 1-2 days Newbie friendliness 52/100

microsoft/CSS-Exchange#2531 · 5 comments · Opened Apr 27, 2026
M365/MDO/ResendFailedMail.ps1 not working cause of deprecation Open

Issue

microsoft/CSS-Exchange#2521 · 1 comment · 1 assignee · Opened Mar 25, 2026
[Issue] SetupLogReviewer doesn't handle logs gracefully Open

Issue Setup Setup Log Reviewer

Difficulty 3/5 1-2 days Newbie friendliness 45/100

microsoft/CSS-Exchange#2501 · Opened Feb 10, 2026
[Issue] - Health Checker - Allow local VulnerabilityReport Open

By Design / No issue Health Checker Need Investigation

Difficulty 3/5 1-2 days Newbie friendliness 38/100

microsoft/CSS-Exchange#2499 · 1 comment · Opened Feb 10, 2026
[Work Item] Add pester testing for AMSI Request Body Scanning Open

Health Checker Work Item

microsoft/CSS-Exchange#2494 · 1 assignee · Opened Feb 3, 2026
Please add sovereign cloud endpoints to Get-CloudServiceEndpoint.ps1 Open

microsoft/CSS-Exchange#2492 · 2 comments · 1 assignee · Opened Feb 3, 2026
[Issue] FindFrontEndActivity.ps1 doesn't find users when Hybrid Modern Authentication is enabled. Open

Issue

Difficulty 3/5 1-2 days Newbie friendliness 45/100

microsoft/CSS-Exchange#2486 · Opened Dec 10, 2025
[Feature] - Health Checker - Public Folder Checks Open

Health Checker Issue

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/CSS-Exchange#2477 · Opened Nov 19, 2025
[Work Item] Health check to check for WinRM config in Registry "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WSMAN\Client" Open

Enhancement Health Checker P1 Work Item

microsoft/CSS-Exchange#2412 · 1 assignee · Opened Sep 5, 2025
Include AMSI Provider information in HC Open

Health Checker Need Investigation

Difficulty 3/5 1-2 days Newbie friendliness 35/100

microsoft/CSS-Exchange#2348 · 1 comment · Opened Jun 9, 2025
[Improvement] - Health Checker: Dedicated Exchange Hybrid Application is recommended in no rich coexistence hybrid configuration Open

Enhancement Health Checker Need Investigation Triage

microsoft/CSS-Exchange#2346 · 1 comment · 1 assignee · Opened Jun 3, 2025
ConfigureExchangeHybridApplication modifies OrgRels between on-prem and other organizations who are using Exchange Online Open

question

microsoft/CSS-Exchange#2332 · 1 comment · 1 assignee · Opened May 21, 2025
[Issue] SetupAssist - Missing SRV Record Open

Issue Setup Setup Assist Setup Log Reviewer

microsoft/CSS-Exchange#2330 · 1 assignee · Opened May 19, 2025
[Issue] Scripts run into "Failed to open the registry" and "The network path was not found" when Remote Registry is not running Open

Issue

microsoft/CSS-Exchange#2325 · 1 assignee · Opened May 14, 2025
[Feature Request] script to verify TLS Certificate configuration on Exchange On-prem Servers Open

Enhancement Health Checker

microsoft/CSS-Exchange#2317 · 4 comments · 1 assignee · Opened Apr 22, 2025
[Feature Request] report domain functional level, schema versions in SetupAssist.ps1 script Open

Awaiting feedback Setup Assist

microsoft/CSS-Exchange#2284 · 11 comments · 1 assignee · Opened Feb 12, 2025
[Feature Request] check for excessive permissions assigned in AD to Exchange groups using HealthChecker Open

Awaiting feedback Health Checker Need Investigation

microsoft/CSS-Exchange#2276 · 5 comments · 2 assignees · Opened Jan 26, 2025
[Feature Request] check for "Debug Programs" right on Default Domain Controller Policy object in HealthChecker Open

Awaiting feedback Enhancement Health Checker Low Priority Need Investigation P2

microsoft/CSS-Exchange#2275 · 8 comments · 1 assignee · Opened Jan 26, 2025
[Feature Request] report Exchange permission model in HealthChecker Open

Enhancement Health Checker P2

microsoft/CSS-Exchange#2274 · 1 assignee · Opened Jan 26, 2025
[Work Item] SetupAssist additional logic to find Schema issues Open

Enhancement Setup Setup Assist Setup Log Reviewer Work Item

microsoft/CSS-Exchange#2270 · 1 assignee · Opened Jan 16, 2025
Update MonitorExchangeAuthCertificate logic Open

Awaiting feedback Triage

microsoft/CSS-Exchange#2250 · 3 comments · 1 assignee · Opened Dec 9, 2024
[Issue] Test-HMAEAS doesn't support SRV Open

Issue

Difficulty 4/5 3-5 days Newbie friendliness 25/100

microsoft/CSS-Exchange#2224 · Opened Nov 14, 2024
[Work Item] Install-Module Shared Code Investigation Open

P2 Work Item

Difficulty 5/5 Over a week Newbie friendliness 35/100

microsoft/CSS-Exchange#2215 · Opened Nov 4, 2024
Scan for Freb , Pipeline tracing, Extra if enabled generate a warning Open

Enhancement good first issue Health Checker P2

microsoft/CSS-Exchange#2195 · 1 comment · 2 assignees · Opened Sep 23, 2024
[Issue]Skip Msinfo32 report creation if it takes longer in ExchangeLogCollector script Open

Exchange Log Collector Issue Need Investigation P2

microsoft/CSS-Exchange#2179 · 1 assignee · Opened Aug 28, 2024
Health Checker -- Include installed 3rd party applications in the report Open

Health Checker P2 Triage

microsoft/CSS-Exchange#2145 · 1 assignee · Opened Jul 17, 2024
Adding Disk Performance Open

Health Checker help wanted P2 Triage

microsoft/CSS-Exchange#2132 · 1 assignee · Opened Jul 11, 2024
[Work Item] - Adjust output of Test-ExchAVExclusions Open

Work Item

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

microsoft/CSS-Exchange#2129 · Opened Jul 5, 2024
[Work Item] New code formatter check to detect domains that have not been approved by CELA Open

Build Process Work Item

microsoft/CSS-Exchange#2106 · 1 comment · 1 assignee · Opened Jun 18, 2024
Show script version before update Open

Enhancement good first issue P2 Shared Function Work Item

microsoft/CSS-Exchange#2104 · 1 assignee · Opened Jun 17, 2024
[Issue] Invoke-WebRequestWithProxyDetection fails on PowerShell 7 when -OutFile is not specified Open

Issue

Difficulty 2/5 1-3 hours Newbie friendliness 58/100

microsoft/CSS-Exchange#2066 · Opened Apr 19, 2024
[Issue] Confirm-ProxyServer does not work on Powershell 7 Open

Issue

Difficulty 3/5 1-2 days Newbie friendliness 35/100

microsoft/CSS-Exchange#2065 · Opened Apr 19, 2024
microsoft-exchange-client-access-server-information-disclosure Open

Health Checker P2 Triage

microsoft/CSS-Exchange#2056 · 3 comments · 1 assignee · Opened Apr 3, 2024
TLS / EP settings script Open

Awaiting feedback good first issue help wanted New Tool Request Triage

Difficulty 4/5 3-5 days Newbie friendliness 30/100

microsoft/CSS-Exchange#2034 · Opened Mar 8, 2024

microsoft/CSS-Exchange

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