QB Issue Resolution:

We’re aware of this issue and an investigation is currently being conducted. I’ll personally make sure you’re added into the system so you get an email when everything’s back up and running. We will have a resolution as quickly as possible and appreciate your patience while we work on this.

Please let me know if there’s anything else I can do for you. I’m always happy to help.

Resolution for Issue 'M&T Bank updated their website this weekend. Since then I have not been able to connect Via Update. Bank error 163 comes up. Help?' available: Yes (Solved).
Source: Intuit Community forum.

M&T Bank updated their website this weekend. Since then I have not been able to connect Via Update. Bank error 163 comes up. Help?: 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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