# My organisation blocks the connection

In many companies — especially law firms, consultancies and enterprises — IT blocks third-party app connections across the board. The good news: **there's always a way.** This page shows all three — fastest first.

## How do I recognise it?

- **Microsoft 365**: Right in the Microsoft sign-in you see **"Need admin approval"** — often with a field to send a justification to IT.
- **Google Workspace**: A message like **"Access blocked: this app has not been verified by your administrator"** / "App is blocked".

If a different error appears instead (cancelled sign-in, wrong account), check [Connection fails](https://docs.kalender-sync.de/en/troubleshooting/connection-fails/) first.

## Option A: iCal feed as a source — no IT, works now

Your calendar's **iCal address** works without any OAuth approval — it's a simple, read-only link that Outlook and Google offer themselves.

1. Copy the ICS URL — [guide per provider](https://docs.kalender-sync.de/en/connect-calendar/ical-feed/#finding-your-calendars-secret-ical-address).
2. Add it in Kalender Sync as an [iCal feed source](https://docs.kalender-sync.de/en/connect-calendar/ical-feed/) (Basic and up).
3. Create a sync with the feed as the source — done.

**Typical setup:** the blocked company calendar becomes a source via feed and blocks your personal Google calendar — nobody double-books you anymore.

The honest trade-offs: the blocked calendar can only act as a **source**, not a target (feeds are read-only), and sync runs on a 5-minute cadence instead of near-instant.

## Option B: Request IT approval — the clean way

An admin approves Kalender Sync **once for the whole organisation**; after that, everyone can connect normally. Effort for IT: **about two minutes.**

Everything your IT needs is collected at **[kalender-sync.de/it-admin](https://kalender-sync.de/it-admin/)**: the Microsoft admin-consent link to click, the requested permissions in detail, a DPA under Art. 28 GDPR, sub-processors and hosting information for the compliance review.

A template for your request:

```text
Subject: Approval for the app "Kalender-Sync" (2 minutes, Microsoft 365 / Google Workspace)

Hi IT team,

I'd like to use Kalender-Sync (kalender-sync.de) to sync calendar
availability in a GDPR-compliant way. When connecting my account,
I get "Need admin approval".

Could you approve the app for our organisation? All information
for your review — permissions, DPA under Art. 28 GDPR,
sub-processors, hosting in Germany — plus the admin-consent link
is here:

https://kalender-sync.de/it-admin/

Thanks!
```

For **Google Workspace**, approval happens in the Admin console (Security → API controls → third-party app access) — your IT will find the details on the IT admin page as well.

## Option C: CalDAV — when Apple or Infomaniak is involved

If one of your calendars lives at **iCloud**, **GMX**, **WEB.DE**, **mailbox.org** or **Infomaniak KSuite**, no OAuth is needed at all: those connections use app passwords you create yourself — no IT required. Guides: [Apple iCloud](https://docs.kalender-sync.de/en/connect-calendar/apple-icloud/), [GMX](https://docs.kalender-sync.de/en/connect-calendar/gmx/), [WEB.DE](https://docs.kalender-sync.de/en/connect-calendar/webde/), [mailbox.org](https://docs.kalender-sync.de/en/connect-calendar/mailboxorg/), [KSuite](https://docs.kalender-sync.de/en/connect-calendar/ksuite/).

## Which option fits?

| Your situation | Recommendation |
| --- | --- |
| Get going right away, the blocked calendar should block others | **Option A** — iCal feed as a source |
| IT is approachable, full functionality wanted | **Option B** — the full scope of your plan (Basic and up: near-instant sync in both directions) |
| Sync needs to write **into** the blocked calendar, IT won't budge | Currently only Option B; an iCal export from Kalender Sync is planned → [Known limitations](https://docs.kalender-sync.de/en/troubleshooting/known-limitations/) |
| iCloud/KSuite calendar involved | **Option C** — app password instead of OAuth |

Still stuck? [Contact us](https://docs.kalender-sync.de/en/troubleshooting/contact-support/) — blocked organisations are a topic we're happy to help with personally.