Lets try searching for “MasterCard” in the search menu/field on the “Add an account” page and select Bank of Montreal – MasterCard (Canada) instead of selecting “Bank of Montreal (Canada)” from the list of banks on that page.
Resolution for 'Bank of Montreal issue: 'Cannot connect BMO Mastercard' available: Yes.
The Bank of Montreal 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 Bank of Montreal issue yourself by looking for a resolution described in the article. If it is a complex Bank of Montreal issue or you are unable to solve the issue, you may contact us by clicking here or by using other Bank of Montreal support options.
For more information about resolving issues related to Bank of Montreal in Quickbooks/QBO or to get support for the issue 'Cannot connect BMO Mastercard', click the link below: