How do I add attachments to events scheduled in my calendar

Question

For some reason I am not able to attach files to events I schedule in my outlook Calendar.  the attachment icon is greyed out. Can I get advice on what I can do to fix this.  thanks

Answer 1

Hi Christopher Walker,

When the Attach (paperclip) option is greyed out while creating a calendar event in Outlook, it’s usually related to how the calendar is set up, rather than anything being wrong with the file itself. A few common scenarios can cause this:

Account type

Calendar attachments are supported on Exchange‑based calendars (Microsoft 365 work/school accounts or Outlook.com). If the calendar belongs to a Gmail or another non‑Microsoft account added via IMAP or POP, the attachment option isn’t available for that calendar type.

New Outlook behavior

In New Outlook (especially on Mac), the attachment button may not appear for certain account types. Many users find that switching temporarily to Classic / Legacy Outlook allows them to add attachments.

Shared or delegated calendars

If the event is on a shared calendar, or if you’re not the original organizer, Outlook may limit what changes can be made including adding attachments.

Workaround

If attachments aren’t supported in your setup, upload the file to OneDrive or SharePoint and paste the sharing link into the meeting description.

To help narrow things down, you can check:

• Whether the calendar is linked to an Exchange / Microsoft 365 account
• Whether you are the meeting organizer
• Whether the event is on your primary calendar

If you’d like more targeted guidance, please share which Outlook version you’re using and what type of account the calendar is connected to.

Please let me know if this proves useful to you, or if you would like further assistance.

I'm looking forward to your reply.

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Answer 2

In Outlook.com and Outlook on the web, files can only be attached to calendar events that are created by the user or by a delegate of the organizer.

If the attachment icon is greyed out, the most likely causes are:

1. The event was created by someone else and shared, so it is not owned by the current user.
2. The user is not a delegate with permission to edit that event.

To be able to attach files:

1. Create a new event directly in the calendar (where the user is the organizer), then the attachment option should be available.
2. If the event is owned by someone else but needs attachments, ask the organizer (or a delegate with edit rights) to add the attachments.

Also note:

• The total email/event size limit in Outlook.com is 25 MB, including all attachments.
• To work around size limits or attachment issues, upload the file to OneDrive and add it as a OneDrive link in the event instead.

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References:

• Unable to attach files in Outlook.com