From Halopedia, the Halo wiki
On June 11, 2007 on Bungie.net, Adjutant Reflex appeared on the forums as an enigmatic character with the security role "CompoundIntelligence", who created its first forum entitled System Integrity Confirmed with its first post being as so:
Adjutant admitted to hacking into the Bungie servers, although it said that it had no hostile intentions, and then proceeded to answer a few queries that was directed towards it. The entity called itself a "facilitator" who facilitated "Array requirements" which were "in flux".
When queried to the current date Adjutant stated the last "Array event" to occur which was 871803909 ± 384 hours before its post on 06.11.2007 12:. This places the last array event approximately 99,455 years before the 2007 post, plus or minus 16 days. This timing coincides with the first firing of the seven Halos, in the year 97,445 BCE. This is calculated using the Gregorian calendar:
Later that day Adjutant attempted to communicate with Halo.Bungie.Org, but later admitted the following day that "Bandwith restraints prevented its use".
On June 12, Adjutant created another thread on Bungie.net entitled "Archive/Resource Estimate," with its first post stating, "Archives/Resources will be compiled in approximately 38 hours [1:00 AM PST on Thursday, June 14]."
During that 38 hours Adjutant made several posts in the "Archive/Resource Estimate" thread stating it could not control the "dissemination of information" as it was chaotic and that it would try to facilitate in the best way it could, though it said "This time, no one will be ready".
On June 14, Adjutant stated that the "first seeds are scattered" in reference to the event that it was foreshadowing. This turned out to be a mass emailing of a cryptic poem, sent by XBox Flash. The email contained a link to Halo3.com, and also showed a mysterious Forerunner symbol.
Shortly after the email was sent out Adjutant changed its avatar to one that had the Forerunner symbol as shown in the email with the name "Chrysopteron.gif" Chrysopteron being the nickname of "Iris" a messenger goddess with golden wings. Also adding the question
To which, when someone answered "Iris", Adjutant stated it was time to sleep saying something was stirring.
The "Iris" code word also triggered a countdown and transmission log. Which was located at 126.96.36.199.
On June 17, Adjutant started a thread in the Bungie.net Halo 3 forum entitled "Stop it." In the thread, it stated that its integrity was being attacked and that it could only maintain it for about 22 hours. It also posted the cryptic message "By the pricking of my thumbs," a quote from William Shakespeare's play Macbeth, which precedes the line "Something wicked this way comes" in the play.
The next day, about 22 hours later, Adjutant started a thread called "That Old Life", stating that it could "not prevail" against the attacks and that an "older life" was here with us that had both higher rank and more strength than Adjunct. Adjutant then stated, "I will seek one of you out and leave my legacy in a small space." In the same thread, Adjutant stated that this "life" has had "millennia for reflection, but what image does he see?", this was in reference to Mendicant Bias being locked away for a millennia to reflect on its actions.
Shortly thereafter, the countdown timer and Transmission Log sped up dramatically, though the end date of the countdown was difficult to determine at first as it seemed to change depending on whether the counter had been refreshed or not, eventually stopping early and not continuing.
At 9:08 AM PDT on June 19, Bungie.net's member, x Foman123 x, received a distressed private message from Adjutant called "HELP ME". The entity claimed that it had already been defeated and that "peril" was near, and asked the user to warn the Community of the threat. Over three increasingly despairing private messages, the entity revealed that a new "machine" that was much more powerful, intelligent, and higher "ranking" would take over.
During these messages, Adjutant posted publicly one last time saying he was helpless to the being's hacking, curious to what it learnt during its "eons of slumber", doubting it was "mercy or sorrow".
Mendicant Bias takeover
Adjutant's last message to x Foman123 x stated that the previous entity had been "terminated" and that the account had been hijacked by a newer, malevolent entity.
Following this Adjutant had a new avatar to signify it was terminated and replaced by this new entity, and posted in a thread called "AR has a new avatar!" the word "STERILIZING" to publicly announce that the old Adjutant was killed. This new avatar was called "MB05032_09_25_07.gif" meaning that Mendicant Bias had taken over the shell of Adjutant.
Mendicant Bias, using the same account as the previous Adjutant Reflex created a new thread called "Last Word", stated that we should be concerned about its "intent" rather than its "identity", and indicated that it would no longer communicate through Bungie.net. It vaguely referred to something that would take place on June 20, but refused to elaborate.
As part of his termination of Adjutant Reflex, the new entity deleted all Bungie.net threads created by AdjutantReflex except for the very first thread titled "System Integrity Confirmed" and the threads that the new entity created.
Mendicant Bias preparations
On June 28, after a long week of silence in the forums and lack of activity elsewhere. The hijacked Adjutant posted a mysterious poetic paragraph :
The thread was only open for 3 minutes. Yet, Mendicant bias did not respond to any of the several posts that were made at that time.
The following day the hijacked Adjutant created a thread called "Veins of Ice and Poison" stating
A few minutes later the following post was made.
This two posts paired together stated meant that Mendicant Bias planned to leave the vessel that was Adjutant Reflex, and showed the new matrix that it was going to start using "ghost.713" on Local node "X.XX.713".
An Empty Casket
On September 13, the hijacked Adjutant Reflex posted one last thread on Bungie.net called "An Empty Casket" stating that the body of Adjutant was not enough to hold it in. Mendicant Bias showed remorse for killing Adjutant, and also told the readers to look for it on Installation 00.
Its first avatar was a simple projected Halo, similar to the one in Silent Cartographer. Its second avatar was one called "Chrysopteron.gif", with the base IRIS glyph in it. The avatar changed a final time to one called "MB05032_09_25_07.gif" when AR was hijacked by Mendicant Bias the presence of another character, this avatar had a terminal design with its blue sigil located at the lower right.
In every post, AR always posted in gold text, and was able to edit posts traits that was indicative of Bungie employees who posted in the forum.
Sometime before March 2009, AdjutantReflex's Bungie.net profile was deleted.