QB Issue Resolution:

I have a citibank mastercard too for my business.  It stops on occasion and I leave it alone and click update and eventually it starts back up.  I don’t understand why it happens unless it is a bank issue.

Resolution for Issue 'For 2 weeks, I haven’t been able to connect to my Citibank Business Thank You MasterCard account. It used to update and out of the blue, stopped working' available: Yes (Solved).
Source: Intuit Community forum.

For 2 weeks, I haven’t been able to connect to my Citibank Business Thank You MasterCard account. It used to update and out of the blue, stopped working: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

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