Invalid Mime Content Error Code 19736 Outlook For Mac

Problem:

MIME types describe the media type of content, either in email, or served by web servers or web applications. They are intended to help provide a hint as to how the content should be processed and displayed. Examples of MIME types: text/html for HTML documents.; text/plain for plain text.; text/css for Cascading Style Sheets.; text/javascript for JavaScript files. Workaround: Use a desktop client to answer S/MIME encoded email. Cannot print calendar in Outlook on the web's new interface as of 09/2019. Per Microsoft, this is known behavior/issue. Workaround 1: Print calendar using the browser option instead of using the print option in Outlook on the Web.

During the migration with CodeTwo Exchange Migration or CodeTwo Office 365 Migration some items are not migrated and one of the following errors is recorded for them in the log files:

Solution:

Invalid Mime Content Error Code 19736 Outlook For Macs

Both of the mentioned errors are caused by the invalid MIME content of the message - this basically means that items are corrupted. Such items may be fully accessible in Outlook or OWA but are considered impossible to be migrated as some of their properties invisible to the end-user, but required for migration, are missing or broken. For your information, it is the requirement of the target EWS service of MS Exchange Server (either On-premises or Online) that migrated items are in good health. CodeTwo Migration software attempts to repair corrupted items, although these attempts are not always successful and then, target server's EWS rejects such corrupted items.

From our experience, MS Outlook has the ability to repair corrupted items. You might want to try using MS Outlook to fix such items if the problem is limited to just a few of them, again in just a few mailbox. To do so, please follow the steps below:

  1. Create a folder on your computer (e.g. on a desktop) in which you will temporary store items with the corrupted MIME content.
  2. Open MS Outlook.
  3. Find the corrupted messages in your mailbox. They will most likely work like a charm in MS Outlook and do not really show any signs of corruption. Review the CodeTwo Migration software 'mailbox' log files to pinpoint the corrupted items first.
  4. Drag and drop corrupted items to the temporary folder (see point 1) from the MS Outlook.
  5. Permanently delete the corrupted items from MS Outlook. Make sure you do not move those items to the Trash/Bin by simply hitting Delete button, use Shift+Delete upon selecting them to remove them from the mailbox completely.
  6. Now, drag and drop exported items back to the MS Outlook, from the temporary folder (see point 4). Pay attention when doing so, to copy items into the same folder of your mailbox that the original items were taken from.
  7. Give it a minute or so, to synchronize Outlook with the Exchange Server.
  8. Close MS Outlook and use the Rescan button in CodeTwo Migration software to restart the migration.

If the above steps do not help or there are too many corrupted items for this workaround, it might be necessary to exclude those items from the migration.

CodeTwo will appreciate if you provide examples of such corrupted items in a PST archive for analysis by our developers. We would like the software to be able to auto repair such items but it is not possible to cover all possible corruption scenarios without appropriate examples. Use our file upload form to provide zipped PST file with examples along with the software diagnostic details. Hopefully, we will be able to implement a software-side fix for your corrupted items in the next release of the software.

See also:

Certificate Is Not Trusted in Web Browser

Invalid Mime Content Error Code 19736 Outlook For Mac

The following warnings are presented by web browsers when you access a site that has a security certificate installed (for SSL/TLS data encryption) that cannot be verified by the browser.

Internet Explorer: 'The security certificate presented by this website was not issued by a trusted certificate authority.'

Firefox 3: 'www.example.com uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown.' or 'www.example.com uses an invalid security certificate. The certificate is not trusted because it is self signed.'

Browsers are made with a built-in list of trusted certificate providers (like DigiCert). For some sites, the certificate provider is not on that list. If this is the case, the browser will warn you that the Certificate Authority (CA) who issued the certificate is not trusted. This issue can also occur if the site has a self-signed certificate. While this warning is fairly generic for Internet Explorer, Firefox 3 will distinguish between a certificate issued by the server itself (a self-signed certificate) and another type of untrusted certificate.

Invalid Mime Content Error Code 19736 Outlook For Macbook Pro

If you have a DigiCert certificate and you receive this error, troubleshoot the problem using the sections below. You do not need to install anything on client devices/applications for a DigiCert SSL Certificate to work properly. The first step is to use our SSL Certificate tester to find the cause of error.

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Self-Signed Certificates

One possible cause of this error is that a self-signed certificate is installed on the server. Self-signed certificates aren't trusted by browsers because they are generated by your server, not by a CA. You can tell if a certificate is self-signed if a CA is not listed in the issuer field in our SSL Certificate tester.

If you find a self-signed certificate on your server after installing a DigiCert certificate, we recommend that you check the installation instructions and make sure that you have completed all of the steps.

If you completed all of the installation steps but are still having an issue, you should generate a new CSR from your server (see the CSR creation instructions) and then reissue the certificate in your DigiCert account by logging in, clicking the order number, and then clicking the reissue link.

Intermediate Certificate Issues

The most common cause of a 'certificate not trusted' error is that the certificate installation was not properly completed on the server (or servers) hosting the site. Use our SSL Certificate tester to check for this issue. In the tester, an incomplete installation shows one certificate file and a broken red chain.

To resolve this problem, install the intermediate certificate (or chain certificate) file to the server that hosts your website. To do that, log into your DigiCert Management Console, click the order number, and then select the certificate download link. This file should be named DigiCertCA.crt. Then follow your server-specific installation instructions to install the intermediate certificate file.

Invalid mime content error code 19736 outlook for mac os

Once you import the intermediate certificate, check the installation again using the SSL Certificate tester. In the tester, an incomplete installation shows multiple certificate files connected by an unbroken blue chain.

Intermediate Certificate Issues (Advanced)

If you receive an error using our SSL Certificate tester, you are using a Windows server, and your certificate's issuer is listed as 'DigiCert High Assurance EV CA-3', please see this article for instructions on troubleshooting a SSL installation error.

Below are a few more warning messages for different browsers.

Internet Explorer 6: 'Information you exchange with this site cannot be viewed or changed by others. However, there is a problem with the site's security certificate. The security certificate was issued by a company you have not chosen to trust. View the certificate to determine whether you want to trust the certifying authority. Do you want to proceed?'

Internet Explorer 7: 'The security certificate presented by this website was not issued by a trusted certificate authority. Security certificate problems may indicate an attempt to fool you or intercept any data you send to the server.'

Firefox 3: 'www.example.com uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown.' or 'www.example.com uses an invalid security certificate. The certificate is not trusted because it is self signed.'