Hi Vlad,
When DocStore was initially configured on the old server, did you define the DocStorage set of folders to be under the data directory or in some other specified location? I presume under the data directory, based on the picture you included, but have to ask since the answer is different depending on the answer.
The reason for the message you posted is that the DocStorage folder identified in the DocStore setup was not found where it was configured to be. Ideally, the data and DocStore move would be completed prior to opening the data in the new location and receiving this message.
If you keep the DocStorage set of folders under the data directory, all you should have to do is move the DocStorage and SoftPDF subfolders from the old data location to the new one. In additional to any other sub-folders you would also move such as for Report PDFs or Emailing.
If you keep the DocStorage set of folders in a specific location, you may need to open DocStore after the data move, open the Company Profile, and re-choose the save location - presuming that the server drive or mapped drive letter has changed. Even if the mapped drive has not changed, it is probably worth re-visiting this selection in DocStore, to ensure that the DocStorage feature is still enabled.
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Regards,
Softrak Tech Support