This:

"Please know that the QuickBooks Online Banking feature always show the exact information that's shared by your bank when syncing transactions. This means that QBO only downloads the details that are given to us by your financial institution."

is certainly the expectation.  But the question at issue is why this is not happening.  It is not "encryption", either.  It is obfuscation by character substitution.  And as the only character substituted for the redacted characters is "X", this is not encryption.  In encrypted messages, the original information is recoverable by running the appropriate decryption algorithm using appropriate keys, etc.  This is not encryption.  It is data destruction, as the original information is NOT recoverable by any technical means.  Additionally, many characters in the Bank Details are unaffected.  This is also not characteristic of encryption.  This is redaction, and again, it is unrecoverable data destruction.

   It is also, to repeat my original complaint, NOT NECESSARY or helpful, as the customer's data is already sufficiently obfuscated by the bank, in cases where real account numbers are used, the BANK transmits only the last four digits in the clear, to allow account identification without revealing the actual complete account number.  There is now no way to distinguish internal transfers of the same amount on the same date.  All details, including confirmation numbers, account numbers, and other numbers whose purpose I don't even know, are affected by this. 

  This is clearly a case of either:

1) QBO (Intuit) is redacting the received information (intentionally or otherwise)

    -  If they are doing it intentionally, they are at minimum, not being transparent and admitting such.  If it is intentional, then they should admit it, and state their reasons for doing it, and allow opting out. 

    -  It they are doing it intentionally, and NOT admitting it, then this is basically dishonest, and there needs to be some investigation as to why, as this amounts to data destruction, and it actively interferes with doing the bookkeeping task.  If there is some sort of coercion involved, then someone needs to appeal to Congress or something.

    -  If they are not doing it intentionally, their development team has some real problems.

2) Banks are delivering a different version of Bank Details to Intuit from what they make available to their customers directly.

    -  If the banks are doing this, then it should be a simple matter for them to disclose this practice and state their reasons for doing so.  Additionally, there should be a way opt out of this practice.

    -  If the banks are not doing this, then see item #1) above.

Unless Intuit is going to claim that the BANKs are delivering the information corrupted like this, they are responsible.  And no disrespect intended to you personally, jenop2, but please refrain from posting any more replies that use inaccurate and misleading terminology to misrepresent the problem, or that fail to acknowledge that Intuit is doing this.  If you must reply, please acknowledge which of the following alternatives is true:

Intuit is doing this, but we are not going to tell you why

Intuit is doing this, but we don't know why it is happening

Intuit is not responsible, as the banks are delivering corrupt information to us

Nobody knows why this is happening, and we can't even agree on WHAT is happening

Thank you.