Error H101, H202, H303, or H505 when opening your company file

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Error H101, H202, H303, or H505 when opening your
company file

• PRESENTED BYhttps//quickbooks.intuit.com/

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How to fix H101, H202, H303 or H505 and other
Multi User setup problems in QuickBooks?

• There are a lot of recommended solutions to
  correct these errors. The first solution either
  solve the problem or you may need to try them all
  to correct the issue. For best results, perform
  the solutions in the correct order that is shown
  below.

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• QuickBooks Desktop is trying to develop a
  connection to the company file and can't reach
  with the server (computer hosting the QuickBooks
  files).
• Several problems can cause the following
• Hosting arrangement settings are incorrect -
  Another computer might have hosting turned on.
  Only the server (where the file is saved) should
  have hosting turned on.
• Note When using Windows Server 2012 Essentials
  R2 as a QuickBooks file server, you may need to
  perform additional steps after every reboot to
  prevent getting the H202 error. See Solution 2
  for detailed credential and steps.
• QB firewall ports are not set accurate - Firewall
  is imposing incoming/outgoing communication to
  the company file. The .ND file is damaged or
  incorrect - The .ND file is a configuration file
  that allows QuickBooks to access a company file
  in a network. A damaged.ND file may avert
  QuickBooks Desktop from retrieving files over the
  network.
• QuickBooks can't get the IP address of the host
  computer - QuickBooks Database Server Manager
  might be using a different/bad IP address.

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DNS settings are incorrect - Workstations are
configured to open the file through the host Full
Qualified Domain Name (ex. computername.domain.com
).
QuickBooks services are not started - QuickBooks
DBXX or QBCF Monitor services are not running and
should be started automatically.

• Solution 1 Download and use the QuickBooks File
  Doctor
• Download and run the QuickBooks File Doctor on
  the server and any workstation getting an
  H-series error. QuickBooks File Doctor will
  attempt to automatically solve the multi-user
  error.

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• Solution 2 Check hosting and services
• In a multi-user environment, hosting should only
  be enabled on the hosting computer (server).
• Verify hosting
• Verify QuickBooks services
• Solution 3 Open the network ports QuickBooks
  uses to transmit data
• Solution 4 Add your server to the Windows hosts
  file
• Solution 5 Create a new folder for your company
  file