This browser is no longer supported.
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(3.2, 53%, 10%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ELF%3C/text%3E%3C/svg%3E)
On exchange 2019 on premise , suddenly without any specific reason , in OWA there are no public folders for users. On outlook clients , when opening client, pulbic folders are visible and data is redable, after aboutn 30 seconds all public folders disappear and there is no public folder element. tried with new outlook profile, new outlook installation, new computer, assigning authorization to user to access all folders, set default public folder for user, everyhthing what is writte in support, no way to make public folders to appear again. There is no way to make public folder appear in OWA. Insalled last CU for exchange 2019. Nothing happens. i have 20 years of data stored wich are inaccessible for some unspecific reason and there is no way to fix it
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(102.4, 11%, 19%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ETD%3C/text%3E%3C/svg%3E)
Hi @leo fabiani
Thank you for posting your question in the Microsoft Q&A forum.
The reason behind these issues is often related to the public folder mailbox that specific user is connected to, or permissions on public folders.
Your public folders are hosted on-premises (PublicFoldersEnabled: Remote)
I understand that you try to bypass that service assignment by stamping requested mail-enabled object on user mailbox using DefaultPublicFolderMailbox parameter. However, only Outlook desktop (Mac and Windows) client can connect to the remote public folder mailbox to retrieve public folder hierarchy. That is illustrated via the PublicFolderInformation field on the Autodiscover service initiated by Outlook to retrieve connection settings for the on-premises public folder mailbox. Therefore, you cannot make public folder appear in OWA, even you set default public folder for user.
Your scenario is the same with the scenario 2 in this article, please refer to this How users access public folders and what to do when they cannot access them? | Microsoft Community Hub
We’re sincerely sorry for this limitation and any inconvenience it may cause.
We truly appreciate your understanding and continued support.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.
*EffectivePublicFolderMailbox/DefaultPublicFolderMailbox are correctly set.
also autodiscover xml contains the correct reference
public folders disappear affter 30 seconds while before are visible and acessible.
if it would be a misconifguration they WILL NEVER BE VISIBLE.
what is making them disappear?
is there any way to make thing work ?*
Hi @leo fabiani
Could you please provide me some details, so that I can clarify your issue:
1.Does this issue occur with specific user mailboxes or all users in the organization?
2.Does the customer have pure on-prem Exchange server 2019 environment? Are all mailboxes and public folder mailboxes created on Exchange 2019?
Additionally, please confirm if Outlook displayed the public folder before, and if this issue started after any modifications or upgrades to Exchange 2019.
3.Are all users using the same version of Outlook clients? Does the issue persist if they upgrade to the latest version of Outlook?
Thank you and your understanding is highly appreciated.
1)All users of organization
2)pure exchange on premise 2019, all public folders reside on exchange server, publi folders where normally working , than suddenly stopped to display without any specific reason.
3) the problem persist with any version of outlook (tried different computers with different outlolok version, problem is always the same, public folders appear when opening outlook, they are accessible, than after about 30 seconds they disappear)
this behaviour is ubuquitary and does not depend of outlook version or corrupted profile nor public folder authorization.
Hi @leo fabiani
Thank you for your prompt response.
I've gathered the information you provided and will conduct a test over the weekend. I hope to find a solution to resolve this issue.
Once again, I appreciate your patience and understanding.
Hi @leo fabiani
Despite thorough research and multiple tests, I regret to inform you that I was unable to find a solution within my capabilities.
I truly appreciate your patience and understanding.