It generally takes about two business days for the item to post, depending on the cut-off time you have set up with Magic-Wrighter. For example, say you have a cut-off time of 12:00 noon ET. If you performed the transfer to pull funds from another institution before 11:45 a.m. ET* on a Monday, the funds would be pulled from the other institution and deposited to the member's credit union account no later than Wednesday. If posted after the cut-off time on Monday, the transactions would be processed no later than Thursday.
(*To be safe we say 11:45 instead of noon because although CU*Answers does transmit A2A transfers directly to M-W when they are posted by members, it does take a little time for the system to complete the processing.)
Remember that A2A is handled via ACH, meaning this schedule is subject to the usual Federal Reserve holidays.