The remote server returns 550 5.7.520 Access Denied

When setting up email forwarding in Acrobat 365, you sometimes receive an error message from Microsoft 365, which may show that the remote server returned 550 5.7.520 Access denied, Your organization does not allow external forward. This is because Microsoft 365 does not allow external forwarding by default and this feature needs to be manually enabled by the IT administrator if necessary. The purpose of this article is to provide you with guidance so that you can successfully enable external forwarding settings.

The remote server returned '550 5.7.520 Access denied, your organization does not allow external forwarding. Please contact your administrator for further assistance. AS(7555)’

What is error code 550 5.7 520?

When you encounter error messages related to automatic forwarding, it is usually because your outbound mail filter settings may be blocking this operation. Or an administrator may be required to create an appropriate custom outbound spam policy to allow automatic external email forwarding and apply it to your account.

Fix the remote server returning 550 5.7.520 Access Denied

When Microsoft 365 displays that the remote server returns error code 550 5.7.520 Access denied, it means that your organization does not allow external forwarding. To resolve this issue, you can first visit Microsoft Defender Security Center and then go to Threat Management Policies and Rules or Policy Antispam Settings.

In the Anti-Spam section, you can allow external forwarding to individuals or to all users. Let's learn how to do the same thing.

Allow individual users to forward externally

If you want to allow specific users in your organization to forward emails to recipients outside your organization, follow the steps mentioned below.

You need to click "Create Policy Outbound".

Now you need to enter a name for this new policy we are creating and click the Next button.

Next, you need to enter the user and other information related to the user and click Next.

Change the automatic forwarding rule setting under the Protection Settings option from "Automatic - System Control" to "Enable Forwarding" and click "Next".

You need to review the rules and click Create after confirming everything.

This will do the job for you.

Read: How to automatically forward emails in Outlook?

Allow external forwarding for all users

If you want to allow all users in your organization to forward their email to external recipients outside your organization, follow these steps:

First, you need to open the Anti-spam outgoing policy (default) from the Anti-spam policy page.

Next, you need to go to edit protection settings.

You need to change the setting of the automatic forwarding rule from "Automatic - System Control" to "Enable Forwarding", and then click "Save".

This will allow you to automatically forward for all users. Keep in mind that this method is generally not recommended for security reasons, as it involves granting access to someone who shouldn't have access in the first place.

Once external forwarding is enabled, users in your organization or required users will be able to forward emails outside your domain and your issue will be resolved.

Read: How to prevent meeting invitations from being forwarded in Outlook?

How to fix Access Denied, your organization does not allow external forwarding?

If you are denied access when trying to forward email externally, you will need to contact your administrator and ask them to grant you the required permissions, as you currently do not have permission to forward email outside your domain. Your IT administrator can add you to an existing policy or create a new policy for you if needed.

Also Read: How to stop email forwarding in Outlook.

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