Martin Günther

.NET software engineer & Azure Architekt. I automate email in M365 and build tools and add-ins for Outlook and MS Teams. I'm also the creator auf AutoReply365.

[Martin Günther @madin]

I built @AutoReply365: automated replies for shared mailboxes in Exchange Online.
Looking for feedback from M365 admins. Mention or DM me for free usage in your own tenant.

[Martin Günther @madin]

Can anyone recommend a PRD skill for Claude Code?

[Martin Günther @madin]

@lxztlr @Aaronontheweb Are you using Memorizer as a ticket system? Could you go into more detail?

[Aaron Stannard @Aaronontheweb]

Trying to open source this fucker as fast as I can

[Martin Günther @madin]

After bringing subagents to Codex on Windows just recently. "Fast mode" is now also supported.
I switched to Codex last week and since it has been a game changer.
#codex #openai #windows

[Martin Günther @madin]

Microsoft Foundry (new) is randomly throwing "Error: too_many_requests: Too Many Requests". Location: GermanyWestCentral, Model: GPT 4.1.
It's a test setup. I'm 100% sure, that I have not sent too many requests. Anyone else seeing this? #microsoft #foundry

[Martin Günther @madin]

Let’s Encrypt is adding DNS-PERSIST-01: publish one persistent DNS TXT record per ACME account instead of updating it every renewal –> faster, safer, and easier automation. Wildcards supported. Targeting Q2 2026
#letsencrypt #ssl

[Martin Günther @madin]

When was the last time you checked your Enterprise Applications in Microsoft Entra?

Take the 2 minutes. You might be surprised what’s in there. 👀

#MicrosoftEntra #Identity #CloudSecurity

[Martin Günther @madin]

@ABeanSits @lexfridman @steipete #2 👏 Just yesterday did I rename a class... Now I see the model was right.

[Martin Günther @madin]

Seeing huge (> 40 KB!) X-Microsoft-Antispam-Message-Info headers on messages coming from Exchange Online since about 04:30 am CET. Any know issues? @MSFT365Status

[Martin Günther @madin]

@MSFT365Status The issues are on our customer's side which use our signature add-on service. They've already raised a ticket. How can we continue with this?

[Martin Günther @madin]

@MSFT365Status Seeing high volume of false-positiv messages in quarantine after emails went through an email signature add-on service. Any know issues?
Is this related to https://t.co/xv7c0BvPkB?
Mail flow is compliant with https://t.co/GtKUxIlUI4

[Microsoft 365 Status @MSFT365Status]

We've disabled a rule change causing legitimate emails to be marked as spam, and we're starting to see recovery. Additional details can be found in the admin center under EX682041.

[Martin Günther @madin]

@MSFT365Status Thanks for your reply. We're not the only solution provider who was affected by this. Please see: https://t.co/kqLOoLQGSC

[Martin Günther @madin]

@MSFT365Status Today we've seen legitimate EXO traffic (especially out of office messages) coming to our servers from IP range 40.95.0.0/16, which is the "high-risk delivery pool", and therefore not on the M365 endpoints list (https://t.co/3crLDxW2ix). Is there an issue?

[Martin Günther @madin]

The best are the best no matter where:

"The people who didn't do any work at home never did any work in the office. ... Hard workers are hard workers no matter where they operate."

A tiny thought in @farnamstreet's newsletter: https://t.co/nhGV6L3i18

[Martin Günther @madin]

@MSFT365Status Has the remote powershell endpoint https://t.co/YZxjeKTHiy been taken down or is it currently just not available?

[Microsoft 365 Status @MSFT365Status]

Users are reporting receiving an error including "550 5.4.1 Recipient address rejected: Access denied" and we are investigating further. More details can be found in the admin center under EX522020.

[Martin Günther @madin]

See: https://t.co/wDris7Y9DM

[Microsoft 365 Status @MSFT365Status]

We're investigating an issue wherein users may be unable to access their Exchange Online mailboxes via any connection method. Additional details can be found within the Service Health Dashboard under EX522020.

[Martin Günther @madin]

@MSFT365Status Seeing an increasing amount of "550 5.4.1 Recipient address rejected" errors on EXO inbound connectors for different tenants. Any know issues?

[Microsoft 365 Status @MSFT365Status]

We're investigating an issue wherein users may be unable to access their Exchange Online mailboxes via any connection method. Additional details can be found within the Service Health Dashboard under EX522020.