What To Do When Google Says "Access Blocked"

Why You're Seeing This

Google Workspace lets admins choose which third-party apps can reach company Google data. When your organization only allows apps it has approved, Google stops the sign-in with Access blocked and Error 400: admin_policy_enforced, and Don't Double Book Me can't connect your calendar until an admin trusts it.

Don't Double Book Me only asks for access to your own calendars and your email address. It never gets access to anyone else's calendar, and it doesn't store your event details. That usually makes the approval a quick one.

Option 1: Request Access from the Error Screen

Some organizations let you ask for access right from Google's error screen. If you see a link or button to request access, use it.

1. Select the request access option and add a short reason, for example "Keeps my work and personal calendars in sync so I don't get double booked."

2. Send the request.

   Your admin reviews it in the Google Admin console.

3. Once approved, come back to Don't Double Book Me and connect your Google account again.

If the screen only shows the error, your organization doesn't take requests there. Use the next option instead.

Option 2: Ask Your IT Admin Directly

Send this to your IT or help desk. It includes the app's OAuth client ID and links to a guide written for Google Workspace admins with the exact clicks to trust the app.

Hi,

I'd like to use Don't Double Book Me (https://dontdoublebookme.com) to keep my work Google Calendar in sync with my other calendars so I don't get double booked. When I try to connect my work account, Google says "Access blocked" (Error 400: admin_policy_enforced).

Could you mark the app as trusted in the Google Admin console? There's a step-by-step guide for Workspace admins here:
https://dontdoublebookme.com/guides/google-workspace-admin-approval

The app's OAuth client ID is:
185041304191-a9vvigiq03d1bfk5stq9s86ml2cq4tu4.apps.googleusercontent.com

It only requests access to my own calendars and my email address (calendar.events, calendar.readonly, userinfo.email, and openid). It doesn't store event details on its servers.

Thanks!

While You Wait

• Connect your other calendars now. Personal Gmail accounts and Microsoft Outlook aren't affected by your organization's Google policy. Set those up today and add the work calendar once it's approved.
• Worried about your free trial? If approval takes longer than your trial, let us know.

Once You're Approved

1. Go to your calendars in Don't Double Book Me and select Add Google Calendar account.

   New here? Sign up with Google instead.

2. Sign in with your work account. You'll see Google's normal permissions screen this time. Select Continue.

3. Pick the calendars you want to keep in sync and you're done. 🎉

Still blocked after IT says it's approved? Google can take a little while to apply the change. Wait a few minutes, try again in a private window, or report the problem and we'll help.